Migrate spelling-0.0.19 changes from main

Emit fixup debug info for internal tooling (#10151 )
See MSFT-33187224 for more information. This may impact debuggability; I have no idea how to tell. (cherry picked from commit 89af44488f)
2021-05-24 08:33:20 -05:00 · 2021-05-24 11:50:04 -05:00 · 2021-05-17 16:37:10 -05:00 · 2021-05-17 14:22:22 -05:00 · 2021-05-14 12:55:00 -05:00 · 2021-05-14 12:42:05 -05:00
197 changed files with 5273 additions and 482849 deletions
--- a/.github/actions/spelling/advice.txt
+++ b/.github/actions/spelling/advice.txt
@ -1,3 +1,4 @@
+<!-- markdownlint-disable MD033 MD041 -->
 <details>
 <summary>
 :pencil2: Contributor please read this
@ -8,9 +9,10 @@ By default the command suggestion will generate a file named based on your commi
 :warning: The command is written for posix shells. You can copy the contents of each `perl` command excluding the outer `'` marks and dropping any `'"`/`"'` quotation mark pairs into a file and then run `perl file.pl` from the root of the repository to run the code. Alternatively, you can manually insert the items...

 If the listed items are:
+
 * ... **misspelled**, then please *correct* them instead of using the command.
-* ... *names*, please add them to `.github/actions/spelling/dictionary/names.txt`.
-* ... APIs, you can add them to a file in `.github/actions/spelling/dictionary/`.
+* ... *names*, please add them to `.github/actions/spelling/allow/names.txt`.
+* ... APIs, you can add them to a file in `.github/actions/spelling/allow/`.
 * ... just things you're using, please add them to an appropriate file in `.github/actions/spelling/expect/`.
 * ... tokens you only need in one place and shouldn't *generally be used*, you can add an item in an appropriate file in `.github/actions/spelling/patterns/`.

@ -18,10 +20,31 @@ See the `README.md` in each directory for more information.

 :microscope: You can test your commits **without** *appending* to a PR by creating a new branch with that extra change and pushing it to your fork. The [check-spelling](https://github.com/marketplace/actions/check-spelling) action will run in response to your **push** -- it doesn't require an open pull request. By using such a branch, you can limit the number of typos your peers see you make. :wink:

-:clamp: If you see a bunch of garbage and it relates to a binary-ish string, please add a file path to the `.github/actions/spelling/excludes.txt` file instead of just accepting the garbage.
+<details><summary>:clamp: If you see a bunch of garbage</summary>
+
+If it relates to a ...
+<details><summary>well-formed pattern</summary>
+
+See if there's a [pattern](https://github.com/check-spelling/check-spelling/wiki/Configuration-Examples:-patterns) that would match it.
+
+If not, try writing one and adding it to a `patterns/{file}.txt`.
+
+Patterns are Perl 5 Regular Expressions - you can [test](
+https://www.regexplanet.com/advanced/perl/) yours before committing to verify it will match your lines.
+
+Note that patterns can't match multiline strings.
+</details>
+<details><summary>binary-ish string</summary>
+
+Please add a file path to the `excludes.txt` file instead of just accepting the garbage.

 File paths are Perl 5 Regular Expressions - you can [test](
 https://www.regexplanet.com/advanced/perl/) yours before committing to verify it will match your files.

-`^` refers to the file's path from the root of the repository, so `^README\.md$` would exclude [README.md](https://github.com/microsoft/terminal/blob/main/README.md) (on whichever branch you're using).
+`^` refers to the file's path from the root of the repository, so `^README\.md$` would exclude [README.md](
+../tree/HEAD/README.md) (on whichever branch you're using).
+</details>
+
+</details>
+
 </details>
--- a/.github/actions/spelling/dictionary/README.md
+++ b/.github/actions/spelling/dictionary/README.md
@ -1,4 +1,4 @@
-# Dictionaries are lists of words to accept unconditionally
+# Allow files are lists of words to accept unconditionally

 While check spelling will complain about an expected word
 which is no longer present, you can include things here even if
@ -8,11 +8,11 @@ E.g., you could include a list of system APIs here, or potential
 contributors (so that if a future commit includes their name,
 it'll be accepted).

-### Files
+## Files

 | File | Description |
 | ---- | ----------- |
-| [Dictionary](dictionary.txt) | Primary US English dictionary |
+| [Allow](allow.txt) | Supplements to the dictionary |
 | [Chinese](chinese.txt) | Chinese words |
 | [Japanese](japanese.txt) | Japanese words |
 | [Microsoft](microsoft.txt) | Microsoft brand items |
--- a/.github/actions/spelling/allow/allow.txt
+++ b/.github/actions/spelling/allow/allow.txt
@ -0,0 +1,77 @@
+apc
+calt
+ccmp
+changelog
+cybersecurity
+Apc
+clickable
+clig
+copyable
+dalet
+dcs
+Dcs
+dialytika
+dje
+downside
+downsides
+dze
+dzhe
+Enum'd
+Fitt
+formattings
+ftp
+fvar
+geeksforgeeks
+ghe
+gje
+hostname
+hostnames
+hyperlink
+hyperlinking
+hyperlinks
+img
+It'd
+kje
+liga
+lje
+locl
+lorem
+Llast
+Lmid
+Lorigin
+maxed
+mkmk
+mru
+noreply
+nje
+ogonek
+ok'd
+overlined
+postmodern
+ptys
+qof
+qps
+rclt
+reimplementation
+reserialization
+reserialize
+reserializes
+rlig
+runtimes
+shcha
+slnt
+Sos
+timestamped
+TLDR
+tokenizes
+tonos
+tshe
+uiatextrange
+UIs
+und
+unregister
+versioned
+We'd
+wildcards
+yeru
+zhe
--- a/.github/actions/spelling/dictionary/apis.txt
+++ b/.github/actions/spelling/dictionary/apis.txt
@ -1,19 +1,38 @@
 ACCEPTFILES
 ACCESSDENIED
+alignas
 alignof
+APPLYTOSUBMENUS
 bitfield
 bitfields
+BUILDBRANCH
+BUILDMSG
+BUILDNUMBER
+BYPOSITION
+charconv
 CLASSNOTAVAILABLE
 cmdletbinding
 COLORPROPERTY
+colspan
+COMDLG
+comparand
+cstdint
 CXICON
 CYICON
-D2DERR_SHADER_COMPILE_FAILED
 dataobject
+dcomp
 DERR
+dlldata
+DONTADDTORECENT
+DWORDLONG
+enumset
 environstrings
 EXPCMDFLAGS
 EXPCMDSTATE
+filetime
+FILTERSPEC
+FORCEFILESYSTEM
+FORCEMINIMIZE
 frac
 fullkbd
 futex
@ -22,90 +41,154 @@ GETHIGHCONTRAST
 Hashtable
 HIGHCONTRASTON
 HIGHCONTRASTW
+hotkeys
 href
+hrgn
+IActivation
 IApp
 IAppearance
 IAsync
 IBind
 IBox
 IClass
-IConnection
 IComparable
+IComparer
+IConnection
 ICustom
 IDialog
 IDirect
 IExplorer
+IFACEMETHOD
+IFile
 IInheritable
 IMap
 IObject
+iosfwd
 IPackage
 IPeasant
+isspace
+ISetup
 IStorage
+istream
 IStringable
 ITab
 ITaskbar
+IUri
 IVirtual
+KEYSELECT
 LCID
 llabs
 llu
 localtime
 lround
 LSHIFT
-MULTIPLEUSE
+MENUCOMMAND
+MENUDATA
+MENUINFO
+memicmp
+mptt
+mov
 msappx
 MULTIPLEUSE
 NCHITTEST
 NCLBUTTONDBLCLK
 NCRBUTTONDBLCLK
+NIF
+NIN
 NOAGGREGATION
 NOASYNC
+NOCHANGEDIR
 NOPROGRESS
 NOREDIRECTIONBITMAP
+NOREPEAT
+NOTIFYBYPOS
+NOTIFYICON
+NOTIFYICONDATA
 ntprivapi
 oaidl
 ocidl
+ODR
+offsetof
+osver
+OSVERSIONINFOEXW
 otms
 OUTLINETEXTMETRICW
 overridable
 PAGESCROLL
+PICKFOLDERS
 pmr
+rcx
 REGCLS
 RETURNCMD
-REGCLS
 rfind
 roundf
 RSHIFT
-rx
 schandle
 semver
 serializer
+SETVERSION
+SHELLEXECUTEINFOW
 shobjidl
+SHOWMINIMIZED
+SHOWTIP
+SINGLEUSE
 SIZENS
 smoothstep
-GETDESKWALLPAPER
-SHELLEXECUTEINFOW
 snprintf
 spsc
 sregex
+SRWLOC
+SRWLOCK
 STDCPP
+STDMETHOD
 strchr
+strcpy
+streambuf
+strtoul
+Stubless
 Subheader
 Subpage
-UPDATEINIFILE
 syscall
+TASKBARCREATED
 TBPF
 THEMECHANGED
+tlg
 tmp
 tolower
+toupper
 TTask
 TVal
-tx
+UChar
 UPDATEINIFILE
 userenv
 wcsstr
 wcstoui
+winmain
+wmemcmp
 wpc
 wsregex
+wwinmain
+xchg
 XDocument
 XElement
+xfacet
+xhash
+XIcon
+xiosbase
+xlocale
+xlocbuf
+xlocinfo
+xlocmes
+xlocmon
+xlocnum
+xloctime
+XMax
+xmemory
 XParse
+xpath
+xstddef
+xstring
+xtree
+xutility
+YIcon
+YMax
--- a/.github/actions/spelling/dictionary/chinese.txt
+++ b/.github/actions/spelling/dictionary/chinese.txt
--- a/.github/actions/spelling/allow/colors.txt
+++ b/.github/actions/spelling/allow/colors.txt
@ -0,0 +1,117 @@
+alice
+aliceblue
+antiquewhite
+blanchedalmond
+blueviolet
+burlywood
+cadetblue
+cornflowerblue
+cornsilk
+cyan
+darkblue
+darkcyan
+darkgoldenrod
+darkgray
+darkgreen
+darkgrey
+darkkhaki
+darkmagenta
+darkolivegreen
+darkorange
+darkorchid
+darkred
+darksalmon
+darkseagreen
+darkslateblue
+darkslategray
+darkslategrey
+darkturquoise
+darkviolet
+deeppink
+deepskyblue
+dimgray
+dimgrey
+dodgerblue
+firebrick
+floralwhite
+forestgreen
+gainsboro
+ghostwhite
+greenyellow
+hotpink
+indian
+indianred
+lavenderblush
+lawngreen
+lemonchiffon
+lightblue
+lightcoral
+lightcyan
+lightgoldenrod
+lightgoldenrodyellow
+lightgray
+lightgreen
+lightgrey
+lightpink
+lightsalmon
+lightseagreen
+lightskyblue
+lightslateblue
+lightslategray
+lightslategrey
+lightsteelblue
+lightyellow
+limegreen
+mediumaquamarine
+mediumblue
+mediumorchid
+mediumpurple
+mediumseagreen
+mediumslateblue
+mediumspringgreen
+mediumturquoise
+mediumvioletred
+midnightblue
+mintcream
+mistyrose
+navajo
+navajowhite
+navyblue
+oldlace
+olivedrab
+orangered
+palegoldenrod
+palegreen
+paleturquoise
+palevioletred
+papayawhip
+peachpuff
+peru
+powderblue
+rebecca
+rebeccapurple
+rosybrown
+royalblue
+saddlebrown
+sandybrown
+seagreen
+sienna
+skyblue
+slateblue
+slategray
+slategrey
+springgreen
+steelblue
+violetred
+webgray
+webgreen
+webgrey
+webmaroon
+webpurple
+whitesmoke
+xaroon
+xray
+xreen
+xrey
+xurple
+yellowgreen
--- a/.github/actions/spelling/dictionary/fonts.txt
+++ b/.github/actions/spelling/dictionary/fonts.txt
@ -7,3 +7,4 @@ Iosevka
 MDL
 Monofur
 Segoe
+wght
--- a/.github/actions/spelling/dictionary/japanese.txt
+++ b/.github/actions/spelling/dictionary/japanese.txt
--- a/.github/actions/spelling/allow/math.txt
+++ b/.github/actions/spelling/allow/math.txt
@ -0,0 +1,11 @@
+atan
+CPrime
+HBar
+HPrime
+isnan
+LPrime
+LStep
+powf
+RSub
+sqrtf
+ULP
--- a/.github/actions/spelling/dictionary/microsoft.txt
+++ b/.github/actions/spelling/dictionary/microsoft.txt
@ -1,13 +1,22 @@
 ACLs
 ADMINS
+advapi
 altform
 altforms
 appendwttlogging
+appx
+appxbundle
+appxerror
+appxmanifest
+ATL
 backplating
 bitmaps
 BOMs
 CPLs
+cpptools
+cppvsdbg
 CPRs
+cryptbase
 DACL
 DACLs
 diffs
@ -16,13 +25,21 @@ dotnetfeed
 DTDs
 DWINRT
 enablewttlogging
+Intelli
+IVisual
 LKG
+LOCKFILE
+Lxss
 mfcribbon
 microsoft
 microsoftonline
+MSAA
+msixbundle
+MSVC
 muxc
 netcore
 osgvsowi
+PFILETIME
 pgc
 pgo
 pgosweep
@ -30,19 +47,29 @@ powerrename
 powershell
 propkey
 pscustomobject
+QWORD
+regedit
 robocopy
 SACLs
+sdkddkver
 Shobjidl
 Skype
+SRW
+sxs
+Sysinternals
 sysnative
 systemroot
 taskkill
 tasklist
 tdbuildteamid
+unvirtualized
 VCRT
 vcruntime
+Virtualization
 visualstudio
+vscode
 VSTHRD
+winsdkver
 wlk
 wslpath
 wtl
--- a/.github/actions/spelling/dictionary/names.txt
+++ b/.github/actions/spelling/dictionary/names.txt
@ -13,6 +13,7 @@ ethanschoonover
 Firefox
 Gatta
 glsl
+Gravell
 Grie
 Griese
 Hernan
@ -30,6 +31,7 @@ Kourosh
 kowalczyk
 leonmsft
 Lepilleur
+lhecker
 lukesampson
 Manandhar
 mbadolato
@ -51,6 +53,7 @@ oldnewthing
 opengl
 osgwiki
 pabhojwa
+panos
 paulcam
 pauldotknopf
 PGP
@ -65,12 +68,13 @@ sonpham
 stakx
 thereses
 Walisch
+Wellons
 Wirt
 Wojciech
 zadjii
 Zamor
-zamora
 Zamora
+zamora
 Zoey
 zorio
 Zverovich
--- a/.github/actions/spelling/dictionary/colors.txt
+++ b/.github/actions/spelling/dictionary/colors.txt
@ -1,782 +0,0 @@
-snow
-ghost-white
-ghostwhite
-white-smoke
-whitesmoke
-gainsboro
-floral-white
-floralwhite
-old-lace
-oldlace
-linen
-antique-white
-antiquewhite
-papaya-whip
-papayawhip
-blanched-almond
-blanchedalmond
-bisque
-peach-puff
-peachpuff
-navajo-white
-navajowhite
-moccasin
-cornsilk
-ivory
-lemon-chiffon
-lemonchiffon
-seashell
-honeydew
-mint-cream
-mintcream
-azure
-alice-blue
-aliceblue
-lavender
-lavender-blush
-lavenderblush
-misty-rose
-mistyrose
-white
-black
-dark-slate-gray
-darkslategray
-dark-slate-grey
-darkslategrey
-dim-gray
-dimgray
-dim-grey
-dimgrey
-slate-gray
-slategray
-slate-grey
-slategrey
-light-slate-gray
-lightslategray
-light-slate-grey
-lightslategrey
-gray
-grey
-xray
-x11gray
-xrey
-x11grey
-web-gray
-webgray
-web-grey
-webgrey
-light-grey
-lightgrey
-light-gray
-lightgray
-midnight-blue
-midnightblue
-navy
-navy-blue
-navyblue
-cornflower-blue
-cornflowerblue
-dark-slate-blue
-darkslateblue
-slate-blue
-slateblue
-medium-slate-blue
-mediumslateblue
-light-slate-blue
-lightslateblue
-medium-blue
-mediumblue
-royal-blue
-royalblue
-blue
-dodger-blue
-dodgerblue
-deep-sky-blue
-deepskyblue
-sky-blue
-skyblue
-light-sky-blue
-lightskyblue
-steel-blue
-steelblue
-light-steel-blue
-lightsteelblue
-light-blue
-lightblue
-powder-blue
-powderblue
-pale-turquoise
-paleturquoise
-dark-turquoise
-darkturquoise
-medium-turquoise
-mediumturquoise
-turquoise
-cyan
-aqua
-light-cyan
-lightcyan
-cadet-blue
-cadetblue
-medium-aquamarine
-mediumaquamarine
-aquamarine
-dark-green
-darkgreen
-dark-olive-green
-darkolivegreen
-dark-sea-green
-darkseagreen
-sea-green
-seagreen
-medium-sea-green
-mediumseagreen
-light-sea-green
-lightseagreen
-pale-green
-palegreen
-spring-green
-springgreen
-lawn-green
-lawngreen
-green
-lime
-xreen
-x11green
-web-green
-webgreen
-chartreuse
-medium-spring-green
-mediumspringgreen
-green-yellow
-greenyellow
-lime-green
-limegreen
-yellow-green
-yellowgreen
-forest-green
-forestgreen
-olive-drab
-olivedrab
-dark-khaki
-darkkhaki
-khaki
-pale-goldenrod
-palegoldenrod
-light-goldenrod-yellow
-lightgoldenrodyellow
-light-yellow
-lightyellow
-yellow
-gold
-light-goldenrod
-lightgoldenrod
-goldenrod
-dark-goldenrod
-darkgoldenrod
-rosy-brown
-rosybrown
-indian-red
-indianred
-saddle-brown
-saddlebrown
-sienna
-peru
-burlywood
-beige
-wheat
-sandy-brown
-sandybrown
-tan
-chocolate
-firebrick
-brown
-dark-salmon
-darksalmon
-salmon
-light-salmon
-lightsalmon
-orange
-dark-orange
-darkorange
-coral
-light-coral
-lightcoral
-tomato
-orange-red
-orangered
-red
-hot-pink
-hotpink
-deep-pink
-deeppink
-pink
-light-pink
-lightpink
-pale-violet-red
-palevioletred
-maroon
-xaroon
-x11maroon
-web-maroon
-webmaroon
-medium-violet-red
-mediumvioletred
-violet-red
-violetred
-magenta
-fuchsia
-violet
-plum
-orchid
-medium-orchid
-mediumorchid
-dark-orchid
-darkorchid
-dark-violet
-darkviolet
-blue-violet
-blueviolet
-purple
-xurple
-x11purple
-web-purple
-webpurple
-medium-purple
-mediumpurple
-thistle
-snow1
-snow2
-snow3
-snow4
-seashell1
-seashell2
-seashell3
-seashell4
-antiquewhite1
-antiquewhite2
-antiquewhite3
-antiquewhite4
-bisque1
-bisque2
-bisque3
-bisque4
-peachpuff1
-peachpuff2
-peachpuff3
-peachpuff4
-navajowhite1
-navajowhite2
-navajowhite3
-navajowhite4
-lemonchiffon1
-lemonchiffon2
-lemonchiffon3
-lemonchiffon4
-cornsilk1
-cornsilk2
-cornsilk3
-cornsilk4
-ivory1
-ivory2
-ivory3
-ivory4
-honeydew1
-honeydew2
-honeydew3
-honeydew4
-lavenderblush1
-lavenderblush2
-lavenderblush3
-lavenderblush4
-mistyrose1
-mistyrose2
-mistyrose3
-mistyrose4
-azure1
-azure2
-azure3
-azure4
-slateblue1
-slateblue2
-slateblue3
-slateblue4
-royalblue1
-royalblue2
-royalblue3
-royalblue4
-blue1
-blue2
-blue3
-blue4
-dodgerblue1
-dodgerblue2
-dodgerblue3
-dodgerblue4
-steelblue1
-steelblue2
-steelblue3
-steelblue4
-deepskyblue1
-deepskyblue2
-deepskyblue3
-deepskyblue4
-skyblue1
-skyblue2
-skyblue3
-skyblue4
-lightskyblue1
-lightskyblue2
-lightskyblue3
-lightskyblue4
-slategray1
-slategray2
-slategray3
-slategray4
-lightsteelblue1
-lightsteelblue2
-lightsteelblue3
-lightsteelblue4
-lightblue1
-lightblue2
-lightblue3
-lightblue4
-lightcyan1
-lightcyan2
-lightcyan3
-lightcyan4
-paleturquoise1
-paleturquoise2
-paleturquoise3
-paleturquoise4
-cadetblue1
-cadetblue2
-cadetblue3
-cadetblue4
-turquoise1
-turquoise2
-turquoise3
-turquoise4
-cyan1
-cyan2
-cyan3
-cyan4
-darkslategray1
-darkslategray2
-darkslategray3
-darkslategray4
-aquamarine1
-aquamarine2
-aquamarine3
-aquamarine4
-darkseagreen1
-darkseagreen2
-darkseagreen3
-darkseagreen4
-seagreen1
-seagreen2
-seagreen3
-seagreen4
-palegreen1
-palegreen2
-palegreen3
-palegreen4
-springgreen1
-springgreen2
-springgreen3
-springgreen4
-green1
-green2
-green3
-green4
-chartreuse1
-chartreuse2
-chartreuse3
-chartreuse4
-olivedrab1
-olivedrab2
-olivedrab3
-olivedrab4
-darkolivegreen1
-darkolivegreen2
-darkolivegreen3
-darkolivegreen4
-khaki1
-khaki2
-khaki3
-khaki4
-lightgoldenrod1
-lightgoldenrod2
-lightgoldenrod3
-lightgoldenrod4
-lightyellow1
-lightyellow2
-lightyellow3
-lightyellow4
-yellow1
-yellow2
-yellow3
-yellow4
-gold1
-gold2
-gold3
-gold4
-goldenrod1
-goldenrod2
-goldenrod3
-goldenrod4
-darkgoldenrod1
-darkgoldenrod2
-darkgoldenrod3
-darkgoldenrod4
-rosybrown1
-rosybrown2
-rosybrown3
-rosybrown4
-indianred1
-indianred2
-indianred3
-indianred4
-sienna1
-sienna2
-sienna3
-sienna4
-burlywood1
-burlywood2
-burlywood3
-burlywood4
-wheat1
-wheat2
-wheat3
-wheat4
-tan1
-tan2
-tan3
-tan4
-chocolate1
-chocolate2
-chocolate3
-chocolate4
-firebrick1
-firebrick2
-firebrick3
-firebrick4
-brown1
-brown2
-brown3
-brown4
-salmon1
-salmon2
-salmon3
-salmon4
-lightsalmon1
-lightsalmon2
-lightsalmon3
-lightsalmon4
-orange1
-orange2
-orange3
-orange4
-darkorange1
-darkorange2
-darkorange3
-darkorange4
-coral1
-coral2
-coral3
-coral4
-tomato1
-tomato2
-tomato3
-tomato4
-orangered1
-orangered2
-orangered3
-orangered4
-red1
-red2
-red3
-red4
-deeppink1
-deeppink2
-deeppink3
-deeppink4
-hotpink1
-hotpink2
-hotpink3
-hotpink4
-pink1
-pink2
-pink3
-pink4
-lightpink1
-lightpink2
-lightpink3
-lightpink4
-palevioletred1
-palevioletred2
-palevioletred3
-palevioletred4
-maroon1
-maroon2
-maroon3
-maroon4
-violetred1
-violetred2
-violetred3
-violetred4
-magenta1
-magenta2
-magenta3
-magenta4
-orchid1
-orchid2
-orchid3
-orchid4
-plum1
-plum2
-plum3
-plum4
-mediumorchid1
-mediumorchid2
-mediumorchid3
-mediumorchid4
-darkorchid1
-darkorchid2
-darkorchid3
-darkorchid4
-purple1
-purple2
-purple3
-purple4
-mediumpurple1
-mediumpurple2
-mediumpurple3
-mediumpurple4
-thistle1
-thistle2
-thistle3
-thistle4
-gray0
-grey0
-gray1
-grey1
-gray2
-grey2
-gray3
-grey3
-gray4
-grey4
-gray5
-grey5
-gray6
-grey6
-gray7
-grey7
-gray8
-grey8
-gray9
-grey9
-gray10
-grey10
-gray11
-grey11
-gray12
-grey12
-gray13
-grey13
-gray14
-grey14
-gray15
-grey15
-gray16
-grey16
-gray17
-grey17
-gray18
-grey18
-gray19
-grey19
-gray20
-grey20
-gray21
-grey21
-gray22
-grey22
-gray23
-grey23
-gray24
-grey24
-gray25
-grey25
-gray26
-grey26
-gray27
-grey27
-gray28
-grey28
-gray29
-grey29
-gray30
-grey30
-gray31
-grey31
-gray32
-grey32
-gray33
-grey33
-gray34
-grey34
-gray35
-grey35
-gray36
-grey36
-gray37
-grey37
-gray38
-grey38
-gray39
-grey39
-gray40
-grey40
-gray41
-grey41
-gray42
-grey42
-gray43
-grey43
-gray44
-grey44
-gray45
-grey45
-gray46
-grey46
-gray47
-grey47
-gray48
-grey48
-gray49
-grey49
-gray50
-grey50
-gray51
-grey51
-gray52
-grey52
-gray53
-grey53
-gray54
-grey54
-gray55
-grey55
-gray56
-grey56
-gray57
-grey57
-gray58
-grey58
-gray59
-grey59
-gray60
-grey60
-gray61
-grey61
-gray62
-grey62
-gray63
-grey63
-gray64
-grey64
-gray65
-grey65
-gray66
-grey66
-gray67
-grey67
-gray68
-grey68
-gray69
-grey69
-gray70
-grey70
-gray71
-grey71
-gray72
-grey72
-gray73
-grey73
-gray74
-grey74
-gray75
-grey75
-gray76
-grey76
-gray77
-grey77
-gray78
-grey78
-gray79
-grey79
-gray80
-grey80
-gray81
-grey81
-gray82
-grey82
-gray83
-grey83
-gray84
-grey84
-gray85
-grey85
-gray86
-grey86
-gray87
-grey87
-gray88
-grey88
-gray89
-grey89
-gray90
-grey90
-gray91
-grey91
-gray92
-grey92
-gray93
-grey93
-gray94
-grey94
-gray95
-grey95
-gray96
-grey96
-gray97
-grey97
-gray98
-grey98
-gray99
-grey99
-gray100
-grey100
-dark-grey
-darkgrey
-dark-gray
-darkgray
-dark-blue
-darkblue
-dark-cyan
-darkcyan
-dark-magenta
-darkmagenta
-dark-red
-darkred
-light-green
-lightgreen
-crimson
-indigo
-olive
-rebecca-purple
-rebeccapurple
-silver
-teal
--- a/.github/actions/spelling/dictionary/dictionary.txt
+++ b/.github/actions/spelling/dictionary/dictionary.txt
--- a/.github/actions/spelling/dictionary/math.txt
+++ b/.github/actions/spelling/dictionary/math.txt
@ -1,3 +0,0 @@
-powf
-sqrtf
-isnan
--- a/.github/actions/spelling/excludes.txt
+++ b/.github/actions/spelling/excludes.txt
@ -1,3 +1,4 @@
+(?:(?i)\.png$)
 (?:^|/)dirs$
 (?:^|/)go\.mod$
 (?:^|/)go\.sum$
@ -35,7 +36,6 @@ SUMS$
 \.pbxproj$
 \.pdf$
 \.pem$
-(?:(?i)\.png$)
 \.psd$
 \.runsettings$
 \.sig$
@ -54,13 +54,26 @@ SUMS$
 \.zip$
 ^consolegit2gitfilters\.json$
 ^dep/
-^oss/
+^doc/reference/master-sequence-list.csv$
 ^doc/reference/UTF8-torture-test\.txt$
+^oss/
+^src/host/ft_uia/run\.bat$
+^src/host/runft\.bat$
+^src/host/runut\.bat$
 ^src/interactivity/onecore/BgfxEngine\.
 ^src/renderer/wddmcon/WddmConRenderer\.
+^src/terminal/adapter/ut_adapter/run\.bat$
+^src/terminal/parser/delfuzzpayload\.bat$
+^src/terminal/parser/ft_fuzzer/run\.bat$
 ^src/terminal/parser/ft_fuzzer/VTCommandFuzzer\.cpp$
-^src/types/ut_types/UtilsTests.cpp$
+^src/terminal/parser/ft_fuzzwrapper/run\.bat$
+^src/terminal/parser/ut_parser/run\.bat$
+^src/tools/integrity/packageuwp/ConsoleUWP\.appxSources$
+^src/tools/lnkd/lnkd\.bat$
+^src/tools/pixels/pixels\.bat$
+^src/tools/texttests/fira\.txt$
 ^src/tools/U8U16Test/(?:fr|ru|zh)\.txt$
+^src/types/ut_types/UtilsTests.cpp$
 ^\.github/actions/spelling/
 ^\.gitignore$
-^doc/reference/master-sequence-list.csv$
+^\XamlStyler.json$
--- a/.github/actions/spelling/expect/alphabet.txt
+++ b/.github/actions/spelling/expect/alphabet.txt
@ -1,3 +1,9 @@
+AAAa
+AAAAA
+AAAAAAAAAAAAA
+AAAAAABBBBBBCCC
+AAAAABBBBBBCCC
+abcd
 abcd
 abcde
 abcdef
@ -5,12 +11,20 @@ ABCDEFG
 ABCDEFGH
 ABCDEFGHIJ
 abcdefghijk
+ABCDEFGHIJKLMNO
 abcdefghijklmnop
 ABCDEFGHIJKLMNOPQRST
 abcdefghijklmnopqrstuvwxyz
+ABCG
 ABE
-BBGGRR
+abf
+BBBBB
+BBBBBBBB
 BBBBBBBBBBBBBBDDDD
+BBBBBCCC
+BBBBCCCCC
+BBGGRR
+CCE
 EFG
 EFGh
 QQQQQQQQQQABCDEFGHIJ
@ -31,3 +45,4 @@ ZYXWVUT
 ZZBBZ
 ZZZBB
 ZZZBZ
+ZZZZZ
--- a/.github/actions/spelling/expect/expect.txt
+++ b/.github/actions/spelling/expect/expect.txt
--- a/.github/actions/spelling/expect/web.txt
+++ b/.github/actions/spelling/expect/web.txt
@ -1,6 +1,7 @@
 http
-td
 www
+easyrgb
+php
 ecma
 rapidtables
 WCAG
@ -10,9 +11,9 @@ robertelder
 kovidgoyal
 leonerd
 fixterms
-uk
 winui
 appshellintegration
+mdtauk
 cppreference
 gfycat
-what3words
+Guake
--- a/.github/actions/spelling/patterns/patterns.txt
+++ b/.github/actions/spelling/patterns/patterns.txt
@ -22,3 +22,6 @@ Base64::s_(?:En|De)code\(L"[^"]+"
 VERIFY_ARE_EQUAL\(L"[^"]+"
 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789\+/"
 std::memory_order_[\w]+
+D2DERR_SHADER_COMPILE_FAILED
+TIL_FEATURE_[0-9A-Z_]+
+vcvars\w*
--- a/.github/actions/spelling/reject.txt
+++ b/.github/actions/spelling/reject.txt
@ -0,0 +1,22 @@
+^attache$
+^attacher$
+^attachers$
+^spae$
+^spaebook$
+^spaecraft$
+^spaed$
+^spaedom$
+^spaeing$
+^spaeings$
+^spae-man$
+^spaeman$
+^spaer$
+^Spaerobee$
+^spaes$
+^spaewife$
+^spaewoman$
+^spaework$
+^spaewright$
+^wether$
+^wethers$
+^wetherteg$
--- a/.github/workflows/spelling.yml
+++ b/.github/workflows/spelling.yml
@ -1,15 +0,0 @@
-name: Spell checking
-on:
-  pull_request_target:
-  push:
-
-jobs:
-  build:
-    name: Spell checking
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2.0.0
-      with:
-        ref: ${{ github.event.pull_request.head.sha }}
-        fetch-depth: 5
-    - uses: check-spelling/check-spelling@0.0.17-alpha
--- a/.github/workflows/spelling2.yml
+++ b/.github/workflows/spelling2.yml
@ -0,0 +1,20 @@
+# spelling.yml is blocked per https://github.com/check-spelling/check-spelling/security/advisories/GHSA-g86g-chm8-7r2p
+name: Spell checking
+on:
+  pull_request_target:
+  push:
+
+jobs:
+  spelling:
+    name: Spell checking
+    runs-on: ubuntu-latest
+    steps:
+    - name: checkout-merge
+      if: "contains(github.event_name, 'pull_request')"
+      uses: actions/checkout@v2
+      with:
+        ref: refs/pull/${{github.event.pull_request.number}}/merge
+    - name: checkout
+      if: "!contains(github.event_name, 'pull_request')"
+      uses: actions/checkout@v2
+    - uses: check-spelling/check-spelling@v0.0.19
--- a/OpenConsole.sln
+++ b/OpenConsole.sln
@ -2410,8 +2410,6 @@ Global
 		{21B7EA5E-1EF8-49B6-AC07-11714AF0E37D}.Release|x86.ActiveCfg = Release|Win32
 		{21B7EA5E-1EF8-49B6-AC07-11714AF0E37D}.Release|x86.Build.0 = Release|Win32
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|Any CPU.ActiveCfg = Release|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|Any CPU.Build.0 = Release|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|Any CPU.Deploy.0 = Release|Any CPU
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|ARM.ActiveCfg = Debug|ARM
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|ARM.Build.0 = Debug|ARM
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|ARM.Deploy.0 = Debug|ARM
@ -2419,11 +2417,7 @@ Global
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|ARM64.Build.0 = Debug|ARM64
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|ARM64.Deploy.0 = Debug|ARM64
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|DotNet_x64Test.ActiveCfg = Release|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|DotNet_x64Test.Build.0 = Release|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|DotNet_x64Test.Deploy.0 = Release|Any CPU
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|DotNet_x86Test.ActiveCfg = Release|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|DotNet_x86Test.Build.0 = Release|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|DotNet_x86Test.Deploy.0 = Release|Any CPU
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|x64.ActiveCfg = Debug|x64
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|x64.Build.0 = Debug|x64
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|x64.Deploy.0 = Debug|x64
@ -2431,8 +2425,6 @@ Global
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|x86.Build.0 = Debug|x86
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.AuditMode|x86.Deploy.0 = Debug|x86
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|ARM.ActiveCfg = Debug|ARM
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|ARM.Build.0 = Debug|ARM
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|ARM.Deploy.0 = Debug|ARM
@ -2440,11 +2432,7 @@ Global
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|ARM64.Build.0 = Debug|ARM64
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|ARM64.Deploy.0 = Debug|ARM64
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|DotNet_x64Test.ActiveCfg = Debug|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|DotNet_x64Test.Build.0 = Debug|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|DotNet_x64Test.Deploy.0 = Debug|Any CPU
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|DotNet_x86Test.ActiveCfg = Debug|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|DotNet_x86Test.Build.0 = Debug|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|DotNet_x86Test.Deploy.0 = Debug|Any CPU
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|x64.ActiveCfg = Debug|x64
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|x64.Build.0 = Debug|x64
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|x64.Deploy.0 = Debug|x64
@ -2452,8 +2440,6 @@ Global
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|x86.Build.0 = Debug|x86
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Debug|x86.Deploy.0 = Debug|x86
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|Any CPU.Build.0 = Release|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|Any CPU.Deploy.0 = Release|Any CPU
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|ARM.ActiveCfg = Release|ARM
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|ARM.Build.0 = Release|ARM
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|ARM.Deploy.0 = Release|ARM
@ -2461,11 +2447,7 @@ Global
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|ARM64.Build.0 = Release|ARM64
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|ARM64.Deploy.0 = Release|ARM64
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|DotNet_x64Test.ActiveCfg = Release|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|DotNet_x64Test.Build.0 = Release|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|DotNet_x64Test.Deploy.0 = Release|Any CPU
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|DotNet_x86Test.ActiveCfg = Release|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|DotNet_x86Test.Build.0 = Release|Any CPU
-		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|DotNet_x86Test.Deploy.0 = Release|Any CPU
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|x64.ActiveCfg = Release|x64
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|x64.Build.0 = Release|x64
 		{F75E29D0-D288-478B-8D83-2C190F321A3F}.Release|x64.Deploy.0 = Release|x64
--- a/doc/cascadia/profiles.schema.json
+++ b/doc/cascadia/profiles.schema.json
@ -1137,6 +1137,11 @@
          "type": "boolean",
          "default": false
        },
+        "tabColor": {
+          "$ref": "#/definitions/Color",
+          "description": "Sets the color of the profile's tab. Using the tab color picker will override this color.",
+          "type": ["string", "null"]
+        },
        "tabTitle": {
          "description": "If set, will replace the name as the title to pass to the shell on startup. Some shells (like bash) may choose to ignore this initial value, while others (cmd, powershell) may use this value over the lifetime of the application.",
          "type": ["string", "null"]
--- a/oss/fmt/cgmanifest.json
+++ b/oss/fmt/cgmanifest.json
@ -4,7 +4,7 @@
       "type": "git", 
       "git": { 
         "repositoryUrl": "https://github.com/fmtlib/fmt", 
-         "commitHash": "f19b1a521ee8b606dedcadfda69fd10ddf882753" 
+         "commitHash": "7bdf0628b1276379886c7f6dda2cef2b3b374f0b" 
         }
       }
    }
--- a/oss/fmt/include/fmt/chrono.h
+++ b/oss/fmt/include/fmt/chrono.h
@ -72,43 +72,27 @@ FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
  static_assert(F::is_integer, "From must be integral");
  static_assert(T::is_integer, "To must be integral");

-  if (F::is_signed && !T::is_signed) {
+  if (detail::const_check(F::is_signed && !T::is_signed)) {
    // From may be negative, not allowed!
    if (fmt::detail::is_negative(from)) {
      ec = 1;
      return {};
    }
-
    // From is positive. Can it always fit in To?
-    if (F::digits <= T::digits) {
-      // yes, From always fits in To.
-    } else {
-      // from may not fit in To, we have to do a dynamic check
-      if (from > static_cast<From>((T::max)())) {
-        ec = 1;
-        return {};
-      }
+    if (F::digits > T::digits &&
+        from > static_cast<From>(detail::max_value<To>())) {
+      ec = 1;
+      return {};
    }
  }

-  if (!F::is_signed && T::is_signed) {
-    // can from be held in To?
-    if (F::digits < T::digits) {
-      // yes, From always fits in To.
-    } else {
-      // from may not fit in To, we have to do a dynamic check
-      if (from > static_cast<From>((T::max)())) {
-        // outside range.
-        ec = 1;
-        return {};
-      }
-    }
+  if (!F::is_signed && T::is_signed && F::digits >= T::digits &&
+      from > static_cast<From>(detail::max_value<To>())) {
+    ec = 1;
+    return {};
  }
-
-  // reaching here means all is ok for lossless conversion.
-  return static_cast<To>(from);
-
-}  // function
+  return static_cast<To>(from);  // Lossless conversion.
+}

 template <typename To, typename From,
          FMT_ENABLE_IF(std::is_same<From, To>::value)>
@ -190,11 +174,9 @@ To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
  // safe conversion to IntermediateRep
  IntermediateRep count =
      lossless_integral_conversion<IntermediateRep>(from.count(), ec);
-  if (ec) {
-    return {};
-  }
+  if (ec) return {};
  // multiply with Factor::num without overflow or underflow
-  if (Factor::num != 1) {
+  if (detail::const_check(Factor::num != 1)) {
    const auto max1 = detail::max_value<IntermediateRep>() / Factor::num;
    if (count > max1) {
      ec = 1;
@ -209,17 +191,9 @@ To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
    count *= Factor::num;
  }

-  // this can't go wrong, right? den>0 is checked earlier.
-  if (Factor::den != 1) {
-    count /= Factor::den;
-  }
-  // convert to the to type, safely
-  using ToRep = typename To::rep;
-  const ToRep tocount = lossless_integral_conversion<ToRep>(count, ec);
-  if (ec) {
-    return {};
-  }
-  return To{tocount};
+  if (detail::const_check(Factor::den != 1)) count /= Factor::den;
+  auto tocount = lossless_integral_conversion<typename To::rep>(count, ec);
+  return ec ? To() : To(tocount);
 }

 /**
@ -351,6 +325,11 @@ inline std::tm localtime(std::time_t time) {
  return lt.tm_;
 }

+inline std::tm localtime(
+    std::chrono::time_point<std::chrono::system_clock> time_point) {
+  return localtime(std::chrono::system_clock::to_time_t(time_point));
+}
+
 // Thread-safe replacement for std::gmtime
 inline std::tm gmtime(std::time_t time) {
  struct dispatcher {
@ -387,6 +366,11 @@ inline std::tm gmtime(std::time_t time) {
  return gt.tm_;
 }

+inline std::tm gmtime(
+    std::chrono::time_point<std::chrono::system_clock> time_point) {
+  return gmtime(std::chrono::system_clock::to_time_t(time_point));
+}
+
 namespace detail {
 inline size_t strftime(char* str, size_t count, const char* format,
                       const std::tm* time) {
@ -399,6 +383,17 @@ inline size_t strftime(wchar_t* str, size_t count, const wchar_t* format,
 }
 }  // namespace detail

+template <typename Char>
+struct formatter<std::chrono::time_point<std::chrono::system_clock>, Char>
+    : formatter<std::tm, Char> {
+  template <typename FormatContext>
+  auto format(std::chrono::time_point<std::chrono::system_clock> val,
+              FormatContext& ctx) -> decltype(ctx.out()) {
+    std::tm time = localtime(val);
+    return formatter<std::tm, Char>::format(time, ctx);
+  }
+};
+
 template <typename Char> struct formatter<std::tm, Char> {
  template <typename ParseContext>
  auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
--- a/oss/fmt/include/fmt/color.h
+++ b/oss/fmt/include/fmt/color.h
@ -463,16 +463,16 @@ template <> inline void reset_color<wchar_t>(FILE* stream) FMT_NOEXCEPT {
 }

 template <typename Char>
-inline void reset_color(basic_memory_buffer<Char>& buffer) FMT_NOEXCEPT {
+inline void reset_color(buffer<Char>& buffer) FMT_NOEXCEPT {
  const char* begin = data::reset_color;
  const char* end = begin + sizeof(data::reset_color) - 1;
  buffer.append(begin, end);
 }

 template <typename Char>
-void vformat_to(basic_memory_buffer<Char>& buf, const text_style& ts,
+void vformat_to(buffer<Char>& buf, const text_style& ts,
                basic_string_view<Char> format_str,
-                basic_format_args<buffer_context<Char>> args) {
+                basic_format_args<buffer_context<type_identity_t<Char>>> args) {
  bool has_style = false;
  if (ts.has_emphasis()) {
    has_style = true;
@ -496,7 +496,7 @@ void vformat_to(basic_memory_buffer<Char>& buf, const text_style& ts,

 template <typename S, typename Char = char_t<S>>
 void vprint(std::FILE* f, const text_style& ts, const S& format,
-            basic_format_args<buffer_context<Char>> args) {
+            basic_format_args<buffer_context<type_identity_t<Char>>> args) {
  basic_memory_buffer<Char> buf;
  detail::vformat_to(buf, ts, to_string_view(format), args);
  buf.push_back(Char(0));
@ -504,20 +504,22 @@ void vprint(std::FILE* f, const text_style& ts, const S& format,
 }

 /**
+  \rst
  Formats a string and prints it to the specified file stream using ANSI
  escape sequences to specify text formatting.
-  Example:
+
+  **Example**::
+
    fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
               "Elapsed time: {0:.2f} seconds", 1.23);
+  \endrst
 */
 template <typename S, typename... Args,
          FMT_ENABLE_IF(detail::is_string<S>::value)>
 void print(std::FILE* f, const text_style& ts, const S& format_str,
           const Args&... args) {
-  detail::check_format_string<Args...>(format_str);
-  using context = buffer_context<char_t<S>>;
-  format_arg_store<context, Args...> as{args...};
-  vprint(f, ts, format_str, basic_format_args<context>(as));
+  vprint(f, ts, format_str,
+         fmt::make_args_checked<Args...>(format_str, args...));
 }

 /**
@ -558,7 +560,42 @@ template <typename S, typename... Args, typename Char = char_t<S>>
 inline std::basic_string<Char> format(const text_style& ts, const S& format_str,
                                      const Args&... args) {
  return vformat(ts, to_string_view(format_str),
-                 detail::make_args_checked<Args...>(format_str, args...));
+                 fmt::make_args_checked<Args...>(format_str, args...));
+}
+
+/**
+  Formats a string with the given text_style and writes the output to ``out``.
+ */
+template <typename OutputIt, typename Char,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value)>
+OutputIt vformat_to(
+    OutputIt out, const text_style& ts, basic_string_view<Char> format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  decltype(detail::get_buffer<Char>(out)) buf(detail::get_buffer_init(out));
+  detail::vformat_to(buf, ts, format_str, args);
+  return detail::get_iterator(buf);
+}
+
+/**
+  \rst
+  Formats arguments with the given text_style, writes the result to the output
+  iterator ``out`` and returns the iterator past the end of the output range.
+
+  **Example**::
+
+    std::vector<char> out;
+    fmt::format_to(std::back_inserter(out),
+                   fmt::emphasis::bold | fg(fmt::color::red), "{}", 42);
+  \endrst
+*/
+template <typename OutputIt, typename S, typename... Args,
+          bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value&&
+              detail::is_string<S>::value>
+inline auto format_to(OutputIt out, const text_style& ts, const S& format_str,
+                      Args&&... args) ->
+    typename std::enable_if<enable, OutputIt>::type {
+  return vformat_to(out, ts, to_string_view(format_str),
+                    fmt::make_args_checked<Args...>(format_str, args...));
 }

 FMT_END_NAMESPACE
--- a/oss/fmt/include/fmt/compile.h
+++ b/oss/fmt/include/fmt/compile.h
@ -368,7 +368,8 @@ template <typename... Args> struct type_list {};

 // Returns a reference to the argument at index N from [first, rest...].
 template <int N, typename T, typename... Args>
-constexpr const auto& get(const T& first, const Args&... rest) {
+constexpr const auto& get([[maybe_unused]] const T& first,
+                          [[maybe_unused]] const Args&... rest) {
  static_assert(N < 1 + sizeof...(Args), "index is out of bounds");
  if constexpr (N == 0)
    return first;
@ -406,6 +407,19 @@ constexpr text<Char> make_text(basic_string_view<Char> s, size_t pos,
  return {{&s[pos], size}};
 }

+template <typename Char> struct code_unit {
+  Char value;
+  using char_type = Char;
+
+  template <typename OutputIt, typename... Args>
+  OutputIt format(OutputIt out, const Args&...) const {
+    return write<Char>(out, value);
+  }
+};
+
+template <typename Char>
+struct is_compiled_format<code_unit<Char>> : std::true_type {};
+
 // A replacement field that refers to argument N.
 template <typename Char, typename T, int N> struct field {
  using char_type = Char;
@ -430,7 +444,9 @@ template <typename Char, typename T, int N> struct spec_field {
  OutputIt format(OutputIt out, const Args&... args) const {
    // This ensures that the argument type is convertile to `const T&`.
    const T& arg = get<N>(args...);
-    basic_format_context<OutputIt, Char> ctx(out, {});
+    const auto& vargs =
+        make_format_args<basic_format_context<OutputIt, Char>>(args...);
+    basic_format_context<OutputIt, Char> ctx(out, vargs);
    return fmt.format(arg, ctx);
  }
 };
@ -489,16 +505,17 @@ constexpr auto parse_tail(T head, S format_str) {
 template <typename T, typename Char> struct parse_specs_result {
  formatter<T, Char> fmt;
  size_t end;
+  int next_arg_id;
 };

 template <typename T, typename Char>
 constexpr parse_specs_result<T, Char> parse_specs(basic_string_view<Char> str,
-                                                  size_t pos) {
+                                                  size_t pos, int arg_id) {
  str.remove_prefix(pos);
-  auto ctx = basic_format_parse_context<Char>(str);
+  auto ctx = basic_format_parse_context<Char>(str, {}, arg_id + 1);
  auto f = formatter<T, Char>();
  auto end = f.parse(ctx);
-  return {f, pos + (end - str.data()) + 1};
+  return {f, pos + (end - str.data()) + 1, ctx.next_arg_id()};
 }

 // Compiles a non-empty format string and returns the compiled representation
@ -518,8 +535,8 @@ constexpr auto compile_format_string(S format_str) {
                                               format_str);
    } else if constexpr (str[POS + 1] == ':') {
      using type = get_type<ID, Args>;
-      constexpr auto result = parse_specs<type>(str, POS + 2);
-      return parse_tail<Args, result.end, ID + 1>(
+      constexpr auto result = parse_specs<type>(str, POS + 2, ID);
+      return parse_tail<Args, result.end, result.next_arg_id>(
          spec_field<char_type, type, ID>{result.fmt}, format_str);
    } else {
      return unknown_format();
@ -530,8 +547,13 @@ constexpr auto compile_format_string(S format_str) {
    return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
  } else {
    constexpr auto end = parse_text(str, POS + 1);
-    return parse_tail<Args, end, ID>(make_text(str, POS, end - POS),
-                                     format_str);
+    if constexpr (end - POS > 1) {
+      return parse_tail<Args, end, ID>(make_text(str, POS, end - POS),
+                                       format_str);
+    } else {
+      return parse_tail<Args, end, ID>(code_unit<char_type>{str[POS]},
+                                       format_str);
+    }
  }
 }

@ -587,8 +609,7 @@ template <typename CompiledFormat, typename... Args,
 FMT_INLINE std::basic_string<Char> format(const CompiledFormat& cf,
                                          const Args&... args) {
  basic_memory_buffer<Char> buffer;
-  detail::buffer<Char>& base = buffer;
-  cf.format(std::back_inserter(base), args...);
+  cf.format(detail::buffer_appender<Char>(buffer), args...);
  return to_string(buffer);
 }

@ -608,8 +629,7 @@ template <typename CompiledFormat, typename... Args,
 std::basic_string<Char> format(const CompiledFormat& cf, const Args&... args) {
  basic_memory_buffer<Char> buffer;
  using context = buffer_context<Char>;
-  detail::buffer<Char>& base = buffer;
-  detail::cf::vformat_to<context>(std::back_inserter(base), cf,
+  detail::cf::vformat_to<context>(detail::buffer_appender<Char>(buffer), cf,
                                  make_format_args<context>(args...));
  return to_string(buffer);
 }
@ -618,9 +638,13 @@ template <typename S, typename... Args,
          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
 FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
                                                           Args&&... args) {
-  constexpr basic_string_view<typename S::char_type> str = S();
-  if (str.size() == 2 && str[0] == '{' && str[1] == '}')
-    return fmt::to_string(detail::first(args...));
+#ifdef __cpp_if_constexpr
+  if constexpr (std::is_same<typename S::char_type, char>::value) {
+    constexpr basic_string_view<typename S::char_type> str = S();
+    if (str.size() == 2 && str[0] == '{' && str[1] == '}')
+      return fmt::to_string(detail::first(args...));
+  }
+#endif
  constexpr auto compiled = detail::compile<Args...>(S());
  return format(compiled, std::forward<Args>(args)...);
 }
@ -643,18 +667,30 @@ OutputIt format_to(OutputIt out, const S&, const Args&... args) {
  return format_to(out, compiled, args...);
 }

-template <
-    typename OutputIt, typename CompiledFormat, typename... Args,
-    FMT_ENABLE_IF(detail::is_output_iterator<OutputIt>::value&& std::is_base_of<
-                  detail::basic_compiled_format, CompiledFormat>::value)>
-format_to_n_result<OutputIt> format_to_n(OutputIt out, size_t n,
-                                         const CompiledFormat& cf,
-                                         const Args&... args) {
+template <typename OutputIt, typename CompiledFormat, typename... Args>
+auto format_to_n(OutputIt out, size_t n, const CompiledFormat& cf,
+                 const Args&... args) ->
+    typename std::enable_if<
+        detail::is_output_iterator<OutputIt,
+                                   typename CompiledFormat::char_type>::value &&
+            std::is_base_of<detail::basic_compiled_format,
+                            CompiledFormat>::value,
+        format_to_n_result<OutputIt>>::type {
  auto it =
      format_to(detail::truncating_iterator<OutputIt>(out, n), cf, args...);
  return {it.base(), it.count()};
 }

+template <typename OutputIt, typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+format_to_n_result<OutputIt> format_to_n(OutputIt out, size_t n, const S&,
+                                         const Args&... args) {
+  constexpr auto compiled = detail::compile<Args...>(S());
+  auto it = format_to(detail::truncating_iterator<OutputIt>(out, n), compiled,
+                      args...);
+  return {it.base(), it.count()};
+}
+
 template <typename CompiledFormat, typename... Args>
 size_t formatted_size(const CompiledFormat& cf, const Args&... args) {
  return format_to(detail::counting_iterator(), cf, args...).count();
--- a/oss/fmt/include/fmt/core.h
+++ b/oss/fmt/include/fmt/core.h
@ -18,7 +18,7 @@
 #include <vector>

 // The fmt library version in the form major * 10000 + minor * 100 + patch.
-#define FMT_VERSION 70001
+#define FMT_VERSION 70103

 #ifdef __clang__
 #  define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
@ -57,6 +57,7 @@
 #  define FMT_MSC_VER 0
 #  define FMT_SUPPRESS_MSC_WARNING(n)
 #endif
+
 #ifdef __has_feature
 #  define FMT_HAS_FEATURE(x) __has_feature(x)
 #else
@ -64,7 +65,7 @@
 #endif

 #if defined(__has_include) && !defined(__INTELLISENSE__) && \
-    !(FMT_ICC_VERSION && FMT_ICC_VERSION < 1600)
+    (!FMT_ICC_VERSION || FMT_ICC_VERSION >= 1600)
 #  define FMT_HAS_INCLUDE(x) __has_include(x)
 #else
 #  define FMT_HAS_INCLUDE(x) 0
@ -99,7 +100,7 @@
 #endif

 #ifndef FMT_OVERRIDE
-#  if FMT_HAS_FEATURE(cxx_override) || \
+#  if FMT_HAS_FEATURE(cxx_override_control) || \
      (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900
 #    define FMT_OVERRIDE override
 #  else
@ -152,7 +153,7 @@
 #  if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VER >= 1900
 #    define FMT_DEPRECATED [[deprecated]]
 #  else
-#    if defined(__GNUC__) || defined(__clang__)
+#    if (defined(__GNUC__) && !defined(__LCC__)) || defined(__clang__)
 #      define FMT_DEPRECATED __attribute__((deprecated))
 #    elif FMT_MSC_VER
 #      define FMT_DEPRECATED __declspec(deprecated)
@ -177,9 +178,17 @@
 #  endif
 #endif

-#ifndef FMT_BEGIN_NAMESPACE
+#ifndef FMT_USE_INLINE_NAMESPACES
 #  if FMT_HAS_FEATURE(cxx_inline_namespaces) || FMT_GCC_VERSION >= 404 || \
-      FMT_MSC_VER >= 1900
+      (FMT_MSC_VER >= 1900 && !_MANAGED)
+#    define FMT_USE_INLINE_NAMESPACES 1
+#  else
+#    define FMT_USE_INLINE_NAMESPACES 0
+#  endif
+#endif
+
+#ifndef FMT_BEGIN_NAMESPACE
+#  if FMT_USE_INLINE_NAMESPACES
 #    define FMT_INLINE_NAMESPACE inline namespace
 #    define FMT_END_NAMESPACE \
      }                       \
@ -269,8 +278,7 @@ struct monostate {};

 namespace detail {

-// A helper function to suppress bogus "conditional expression is constant"
-// warnings.
+// A helper function to suppress "conditional expression is constant" warnings.
 template <typename T> constexpr T const_check(T value) { return value; }

 FMT_NORETURN FMT_API void assert_fail(const char* file, int line,
@ -299,7 +307,8 @@ template <typename T> struct std_string_view {};

 #ifdef FMT_USE_INT128
 // Do nothing.
-#elif defined(__SIZEOF_INT128__) && !FMT_NVCC
+#elif defined(__SIZEOF_INT128__) && !FMT_NVCC && \
+    !(FMT_CLANG_VERSION && FMT_MSC_VER)
 #  define FMT_USE_INT128 1
 using int128_t = __int128_t;
 using uint128_t = __uint128_t;
@ -506,6 +515,18 @@ template <typename S> struct char_t_impl<S, enable_if_t<is_string<S>::value>> {
  using type = typename result::value_type;
 };

+// Reports a compile-time error if S is not a valid format string.
+template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
+FMT_INLINE void check_format_string(const S&) {
+#ifdef FMT_ENFORCE_COMPILE_STRING
+  static_assert(is_compile_string<S>::value,
+                "FMT_ENFORCE_COMPILE_STRING requires all format strings to use "
+                "FMT_STRING.");
+#endif
+}
+template <typename..., typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
+void check_format_string(S);
+
 struct error_handler {
  constexpr error_handler() = default;
  constexpr error_handler(const error_handler&) = default;
@ -545,8 +566,9 @@ class basic_format_parse_context : private ErrorHandler {
  using iterator = typename basic_string_view<Char>::iterator;

  explicit constexpr basic_format_parse_context(
-      basic_string_view<Char> format_str, ErrorHandler eh = {})
-      : ErrorHandler(eh), format_str_(format_str), next_arg_id_(0) {}
+      basic_string_view<Char> format_str, ErrorHandler eh = {},
+      int next_arg_id = 0)
+      : ErrorHandler(eh), format_str_(format_str), next_arg_id_(next_arg_id) {}

  /**
    Returns an iterator to the beginning of the format string range being
@ -616,8 +638,24 @@ template <typename T, typename Context>
 using has_formatter =
    std::is_constructible<typename Context::template formatter_type<T>>;

+// Checks whether T is a container with contiguous storage.
+template <typename T> struct is_contiguous : std::false_type {};
+template <typename Char>
+struct is_contiguous<std::basic_string<Char>> : std::true_type {};
+
 namespace detail {

+// Extracts a reference to the container from back_insert_iterator.
+template <typename Container>
+inline Container& get_container(std::back_insert_iterator<Container> it) {
+  using bi_iterator = std::back_insert_iterator<Container>;
+  struct accessor : bi_iterator {
+    accessor(bi_iterator iter) : bi_iterator(iter) {}
+    using bi_iterator::container;
+  };
+  return *accessor(it).container;
+}
+
 /**
  \rst
  A contiguous memory buffer with an optional growing ability. It is an internal
@ -640,6 +678,8 @@ template <typename T> class buffer {
        size_(sz),
        capacity_(cap) {}

+  ~buffer() = default;
+
  /** Sets the buffer data and capacity. */
  void set(T* buf_data, size_t buf_capacity) FMT_NOEXCEPT {
    ptr_ = buf_data;
@ -655,7 +695,6 @@ template <typename T> class buffer {

  buffer(const buffer&) = delete;
  void operator=(const buffer&) = delete;
-  virtual ~buffer() = default;

  T* begin() FMT_NOEXCEPT { return ptr_; }
  T* end() FMT_NOEXCEPT { return ptr_ + size_; }
@ -675,24 +714,26 @@ template <typename T> class buffer {
  /** Returns a pointer to the buffer data. */
  const T* data() const FMT_NOEXCEPT { return ptr_; }

-  /**
-    Resizes the buffer. If T is a POD type new elements may not be initialized.
-   */
-  void resize(size_t new_size) {
-    reserve(new_size);
-    size_ = new_size;
-  }
-
  /** Clears this buffer. */
  void clear() { size_ = 0; }

-  /** Reserves space to store at least *capacity* elements. */
-  void reserve(size_t new_capacity) {
+  // Tries resizing the buffer to contain *count* elements. If T is a POD type
+  // the new elements may not be initialized.
+  void try_resize(size_t count) {
+    try_reserve(count);
+    size_ = count <= capacity_ ? count : capacity_;
+  }
+
+  // Tries increasing the buffer capacity to *new_capacity*. It can increase the
+  // capacity by a smaller amount than requested but guarantees there is space
+  // for at least one additional element either by increasing the capacity or by
+  // flushing the buffer if it is full.
+  void try_reserve(size_t new_capacity) {
    if (new_capacity > capacity_) grow(new_capacity);
  }

  void push_back(const T& value) {
-    reserve(size_ + 1);
+    try_reserve(size_ + 1);
    ptr_[size_++] = value;
  }

@ -705,32 +746,150 @@ template <typename T> class buffer {
  }
 };

-// A container-backed buffer.
+struct buffer_traits {
+  explicit buffer_traits(size_t) {}
+  size_t count() const { return 0; }
+  size_t limit(size_t size) { return size; }
+};
+
+class fixed_buffer_traits {
+ private:
+  size_t count_ = 0;
+  size_t limit_;
+
+ public:
+  explicit fixed_buffer_traits(size_t limit) : limit_(limit) {}
+  size_t count() const { return count_; }
+  size_t limit(size_t size) {
+    size_t n = limit_ > count_ ? limit_ - count_ : 0;
+    count_ += size;
+    return size < n ? size : n;
+  }
+};
+
+// A buffer that writes to an output iterator when flushed.
+template <typename OutputIt, typename T, typename Traits = buffer_traits>
+class iterator_buffer final : public Traits, public buffer<T> {
+ private:
+  OutputIt out_;
+  enum { buffer_size = 256 };
+  T data_[buffer_size];
+
+ protected:
+  void grow(size_t) final FMT_OVERRIDE {
+    if (this->size() == buffer_size) flush();
+  }
+  void flush();
+
+ public:
+  explicit iterator_buffer(OutputIt out, size_t n = buffer_size)
+      : Traits(n),
+        buffer<T>(data_, 0, buffer_size),
+        out_(out) {}
+  ~iterator_buffer() { flush(); }
+
+  OutputIt out() {
+    flush();
+    return out_;
+  }
+  size_t count() const { return Traits::count() + this->size(); }
+};
+
+template <typename T> class iterator_buffer<T*, T> final : public buffer<T> {
+ protected:
+  void grow(size_t) final FMT_OVERRIDE {}
+
+ public:
+  explicit iterator_buffer(T* out, size_t = 0) : buffer<T>(out, 0, ~size_t()) {}
+
+  T* out() { return &*this->end(); }
+};
+
+// A buffer that writes to a container with the contiguous storage.
 template <typename Container>
-class container_buffer : public buffer<typename Container::value_type> {
+class iterator_buffer<std::back_insert_iterator<Container>,
+                      enable_if_t<is_contiguous<Container>::value,
+                                  typename Container::value_type>>
+    final : public buffer<typename Container::value_type> {
 private:
  Container& container_;

 protected:
-  void grow(size_t capacity) FMT_OVERRIDE {
+  void grow(size_t capacity) final FMT_OVERRIDE {
    container_.resize(capacity);
    this->set(&container_[0], capacity);
  }

 public:
-  explicit container_buffer(Container& c)
+  explicit iterator_buffer(Container& c)
      : buffer<typename Container::value_type>(c.size()), container_(c) {}
+  explicit iterator_buffer(std::back_insert_iterator<Container> out, size_t = 0)
+      : iterator_buffer(get_container(out)) {}
+  std::back_insert_iterator<Container> out() {
+    return std::back_inserter(container_);
+  }
 };

-// Extracts a reference to the container from back_insert_iterator.
-template <typename Container>
-inline Container& get_container(std::back_insert_iterator<Container> it) {
-  using bi_iterator = std::back_insert_iterator<Container>;
-  struct accessor : bi_iterator {
-    accessor(bi_iterator iter) : bi_iterator(iter) {}
-    using bi_iterator::container;
-  };
-  return *accessor(it).container;
+// A buffer that counts the number of code units written discarding the output.
+template <typename T = char> class counting_buffer final : public buffer<T> {
+ private:
+  enum { buffer_size = 256 };
+  T data_[buffer_size];
+  size_t count_ = 0;
+
+ protected:
+  void grow(size_t) final FMT_OVERRIDE {
+    if (this->size() != buffer_size) return;
+    count_ += this->size();
+    this->clear();
+  }
+
+ public:
+  counting_buffer() : buffer<T>(data_, 0, buffer_size) {}
+
+  size_t count() { return count_ + this->size(); }
+};
+
+// An output iterator that appends to the buffer.
+// It is used to reduce symbol sizes for the common case.
+template <typename T>
+class buffer_appender : public std::back_insert_iterator<buffer<T>> {
+  using base = std::back_insert_iterator<buffer<T>>;
+
+ public:
+  explicit buffer_appender(buffer<T>& buf) : base(buf) {}
+  buffer_appender(base it) : base(it) {}
+
+  buffer_appender& operator++() {
+    base::operator++();
+    return *this;
+  }
+
+  buffer_appender operator++(int) {
+    buffer_appender tmp = *this;
+    ++*this;
+    return tmp;
+  }
+};
+
+// Maps an output iterator into a buffer.
+template <typename T, typename OutputIt>
+iterator_buffer<OutputIt, T> get_buffer(OutputIt);
+template <typename T> buffer<T>& get_buffer(buffer_appender<T>);
+
+template <typename OutputIt> OutputIt get_buffer_init(OutputIt out) {
+  return out;
+}
+template <typename T> buffer<T>& get_buffer_init(buffer_appender<T> out) {
+  return get_container(out);
+}
+
+template <typename Buffer>
+auto get_iterator(Buffer& buf) -> decltype(buf.out()) {
+  return buf.out();
+}
+template <typename T> buffer_appender<T> get_iterator(buffer<T>& buf) {
+  return buffer_appender<T>(buf);
 }

 template <typename T, typename Char = char, typename Enable = void>
@ -759,7 +918,8 @@ template <typename Char> struct named_arg_info {
 template <typename T, typename Char, size_t NUM_ARGS, size_t NUM_NAMED_ARGS>
 struct arg_data {
  // args_[0].named_args points to named_args_ to avoid bloating format_args.
-  T args_[1 + (NUM_ARGS != 0 ? NUM_ARGS : 1)];
+  // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
+  T args_[1 + (NUM_ARGS != 0 ? NUM_ARGS : +1)];
  named_arg_info<Char> named_args_[NUM_NAMED_ARGS];

  template <typename... U>
@ -771,7 +931,8 @@ struct arg_data {

 template <typename T, typename Char, size_t NUM_ARGS>
 struct arg_data<T, Char, NUM_ARGS, 0> {
-  T args_[NUM_ARGS != 0 ? NUM_ARGS : 1];
+  // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
+  T args_[NUM_ARGS != 0 ? NUM_ARGS : +1];

  template <typename... U>
  FMT_INLINE arg_data(const U&... init) : args_{init...} {}
@ -959,6 +1120,8 @@ enum { long_short = sizeof(long) == sizeof(int) };
 using long_type = conditional_t<long_short, int, long long>;
 using ulong_type = conditional_t<long_short, unsigned, unsigned long long>;

+struct unformattable {};
+
 // Maps formatting arguments to core types.
 template <typename Context> struct arg_mapper {
  using char_type = typename Context::char_type;
@ -1067,15 +1230,7 @@ template <typename Context> struct arg_mapper {
    return map(val.value);
  }

-  int map(...) {
-    constexpr bool formattable = sizeof(Context) == 0;
-    static_assert(
-        formattable,
-        "Cannot format argument. To make type T formattable provide a "
-        "formatter<T> specialization: "
-        "https://fmt.dev/latest/api.html#formatting-user-defined-types");
-    return 0;
-  }
+  unformattable map(...) { return {}; }
 };

 // A type constant after applying arg_mapper<Context>.
@ -1199,15 +1354,25 @@ FMT_CONSTEXPR_DECL FMT_INLINE auto visit_format_arg(
  return vis(monostate());
 }

-// Checks whether T is a container with contiguous storage.
-template <typename T> struct is_contiguous : std::false_type {};
-template <typename Char>
-struct is_contiguous<std::basic_string<Char>> : std::true_type {};
-template <typename Char>
-struct is_contiguous<detail::buffer<Char>> : std::true_type {};
+template <typename T> struct formattable : std::false_type {};

 namespace detail {

+// A workaround for gcc 4.8 to make void_t work in a SFINAE context.
+template <typename... Ts> struct void_t_impl { using type = void; };
+template <typename... Ts>
+using void_t = typename detail::void_t_impl<Ts...>::type;
+
+template <typename It, typename T, typename Enable = void>
+struct is_output_iterator : std::false_type {};
+
+template <typename It, typename T>
+struct is_output_iterator<
+    It, T,
+    void_t<typename std::iterator_traits<It>::iterator_category,
+           decltype(*std::declval<It>() = std::declval<T>())>>
+    : std::true_type {};
+
 template <typename OutputIt>
 struct is_back_insert_iterator : std::false_type {};
 template <typename Container>
@ -1219,6 +1384,9 @@ struct is_contiguous_back_insert_iterator : std::false_type {};
 template <typename Container>
 struct is_contiguous_back_insert_iterator<std::back_insert_iterator<Container>>
    : is_contiguous<Container> {};
+template <typename Char>
+struct is_contiguous_back_insert_iterator<buffer_appender<Char>>
+    : std::true_type {};

 // A type-erased reference to an std::locale to avoid heavy <locale> include.
 class locale_ref {
@ -1250,13 +1418,24 @@ FMT_CONSTEXPR basic_format_arg<Context> make_arg(const T& value) {
  return arg;
 }

+template <typename T> int check(unformattable) {
+  static_assert(
+      formattable<T>(),
+      "Cannot format an argument. To make type T formattable provide a "
+      "formatter<T> specialization: https://fmt.dev/latest/api.html#udt");
+  return 0;
+}
+template <typename T, typename U> inline const U& check(const U& val) {
+  return val;
+}
+
 // The type template parameter is there to avoid an ODR violation when using
 // a fallback formatter in one translation unit and an implicit conversion in
 // another (not recommended).
 template <bool IS_PACKED, typename Context, type, typename T,
          FMT_ENABLE_IF(IS_PACKED)>
 inline value<Context> make_arg(const T& val) {
-  return arg_mapper<Context>().map(val);
+  return check<T>(arg_mapper<Context>().map(val));
 }

 template <bool IS_PACKED, typename Context, type, typename T,
@ -1356,13 +1535,13 @@ template <typename OutputIt, typename Char> class basic_format_context {

 template <typename Char>
 using buffer_context =
-    basic_format_context<std::back_insert_iterator<detail::buffer<Char>>, Char>;
+    basic_format_context<detail::buffer_appender<Char>, Char>;
 using format_context = buffer_context<char>;
 using wformat_context = buffer_context<wchar_t>;

-// Workaround a bug in gcc: https://stackoverflow.com/q/62767544/471164.
+// Workaround an alias issue: https://stackoverflow.com/q/62767544/471164.
 #define FMT_BUFFER_CONTEXT(Char) \
-  basic_format_context<std::back_insert_iterator<detail::buffer<Char>>, Char>
+  basic_format_context<detail::buffer_appender<Char>, Char>

 /**
  \rst
@ -1414,7 +1593,7 @@ class format_arg_store

 /**
  \rst
-  Constructs an `~fmt::format_arg_store` object that contains references to
+  Constructs a `~fmt::format_arg_store` object that contains references to
  arguments and can be implicitly converted to `~fmt::format_args`. `Context`
  can be omitted in which case it defaults to `~fmt::context`.
  See `~fmt::arg` for lifetime considerations.
@ -1426,6 +1605,27 @@ inline format_arg_store<Context, Args...> make_format_args(
  return {args...};
 }

+/**
+  \rst
+  Constructs a `~fmt::format_arg_store` object that contains references
+  to arguments and can be implicitly converted to `~fmt::format_args`.
+  If ``format_str`` is a compile-time string then `make_args_checked` checks
+  its validity at compile time.
+  \endrst
+ */
+template <typename... Args, typename S, typename Char = char_t<S>>
+inline auto make_args_checked(const S& format_str,
+                              const remove_reference_t<Args>&... args)
+    -> format_arg_store<buffer_context<Char>, remove_reference_t<Args>...> {
+  static_assert(
+      detail::count<(
+              std::is_base_of<detail::view, remove_reference_t<Args>>::value &&
+              std::is_reference<Args>::value)...>() == 0,
+      "passing views as lvalues is disallowed");
+  detail::check_format_string<Args...>(format_str);
+  return {args...};
+}
+
 /**
  \rst
  Returns a named argument to be used in a formatting function. It should only
@ -1713,7 +1913,7 @@ template <typename Context> class basic_format_args {
  }

  template <typename Char> int get_id(basic_string_view<Char> name) const {
-    if (!has_named_args()) return {};
+    if (!has_named_args()) return -1;
    const auto& named_args =
        (is_packed() ? values_[-1] : args_[-1].value_).named_args;
    for (size_t i = 0; i < named_args.size; ++i) {
@ -1729,7 +1929,14 @@ template <typename Context> class basic_format_args {
  }
 };

-/** An alias to ``basic_format_args<context>``. */
+#ifdef FMT_ARM_ABI_COMPATIBILITY
+/** An alias to ``basic_format_args<format_context>``. */
+// Separate types would result in shorter symbols but break ABI compatibility
+// between clang and gcc on ARM (#1919).
+using format_args = basic_format_args<format_context>;
+using wformat_args = basic_format_args<wformat_context>;
+#else
+// DEPRECATED! These are kept for ABI compatibility.
 // It is a separate type rather than an alias to make symbols readable.
 struct format_args : basic_format_args<format_context> {
  template <typename... Args>
@ -1738,32 +1945,10 @@ struct format_args : basic_format_args<format_context> {
 struct wformat_args : basic_format_args<wformat_context> {
  using basic_format_args::basic_format_args;
 };
+#endif

 namespace detail {

-// Reports a compile-time error if S is not a valid format string.
-template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
-FMT_INLINE void check_format_string(const S&) {
-#ifdef FMT_ENFORCE_COMPILE_STRING
-  static_assert(is_compile_string<S>::value,
-                "FMT_ENFORCE_COMPILE_STRING requires all format strings to use "
-                "FMT_STRING.");
-#endif
-}
-template <typename..., typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
-void check_format_string(S);
-
-template <typename... Args, typename S, typename Char = char_t<S>>
-inline format_arg_store<buffer_context<Char>, remove_reference_t<Args>...>
-make_args_checked(const S& format_str,
-                  const remove_reference_t<Args>&... args) {
-  static_assert(count<(std::is_base_of<view, remove_reference_t<Args>>::value &&
-                       std::is_reference<Args>::value)...>() == 0,
-                "passing views as lvalues is disallowed");
-  check_format_string<Args...>(format_str);
-  return {args...};
-}
-
 template <typename Char, FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
 std::basic_string<Char> vformat(
    basic_string_view<Char> format_str,
@ -1772,9 +1957,10 @@ std::basic_string<Char> vformat(
 FMT_API std::string vformat(string_view format_str, format_args args);

 template <typename Char>
-typename FMT_BUFFER_CONTEXT(Char)::iterator vformat_to(
+void vformat_to(
    buffer<Char>& buf, basic_string_view<Char> format_str,
-    basic_format_args<FMT_BUFFER_CONTEXT(type_identity_t<Char>)> args);
+    basic_format_args<FMT_BUFFER_CONTEXT(type_identity_t<Char>)> args,
+    detail::locale_ref loc = {});

 template <typename Char, typename Args,
          FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
@ -1789,26 +1975,80 @@ inline void vprint_mojibake(std::FILE*, string_view, format_args) {}
 /** Formats a string and writes the output to ``out``. */
 // GCC 8 and earlier cannot handle std::back_insert_iterator<Container> with
 // vformat_to<ArgFormatter>(...) overload, so SFINAE on iterator type instead.
-template <
-    typename OutputIt, typename S, typename Char = char_t<S>,
-    FMT_ENABLE_IF(detail::is_contiguous_back_insert_iterator<OutputIt>::value)>
-OutputIt vformat_to(
-    OutputIt out, const S& format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
-  auto& c = detail::get_container(out);
-  detail::container_buffer<remove_reference_t<decltype(c)>> buf(c);
+template <typename OutputIt, typename S, typename Char = char_t<S>,
+          bool enable = detail::is_output_iterator<OutputIt, Char>::value>
+auto vformat_to(OutputIt out, const S& format_str,
+                basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> typename std::enable_if<enable, OutputIt>::type {
+  decltype(detail::get_buffer<Char>(out)) buf(detail::get_buffer_init(out));
  detail::vformat_to(buf, to_string_view(format_str), args);
-  return out;
+  return detail::get_iterator(buf);
 }

-template <typename Container, typename S, typename... Args,
-          FMT_ENABLE_IF(
-              is_contiguous<Container>::value&& detail::is_string<S>::value)>
-inline std::back_insert_iterator<Container> format_to(
-    std::back_insert_iterator<Container> out, const S& format_str,
-    Args&&... args) {
-  return vformat_to(out, to_string_view(format_str),
-                    detail::make_args_checked<Args...>(format_str, args...));
+/**
+ \rst
+ Formats arguments, writes the result to the output iterator ``out`` and returns
+ the iterator past the end of the output range.
+
+ **Example**::
+
+   std::vector<char> out;
+   fmt::format_to(std::back_inserter(out), "{}", 42);
+ \endrst
+ */
+// We cannot use FMT_ENABLE_IF because of a bug in gcc 8.3.
+template <typename OutputIt, typename S, typename... Args,
+          bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value>
+inline auto format_to(OutputIt out, const S& format_str, Args&&... args) ->
+    typename std::enable_if<enable, OutputIt>::type {
+  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+  return vformat_to(out, to_string_view(format_str), vargs);
+}
+
+template <typename OutputIt> struct format_to_n_result {
+  /** Iterator past the end of the output range. */
+  OutputIt out;
+  /** Total (not truncated) output size. */
+  size_t size;
+};
+
+template <typename OutputIt, typename Char, typename... Args,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value)>
+inline format_to_n_result<OutputIt> vformat_to_n(
+    OutputIt out, size_t n, basic_string_view<Char> format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  detail::iterator_buffer<OutputIt, Char, detail::fixed_buffer_traits> buf(out,
+                                                                           n);
+  detail::vformat_to(buf, format_str, args);
+  return {buf.out(), buf.count()};
+}
+
+/**
+ \rst
+ Formats arguments, writes up to ``n`` characters of the result to the output
+ iterator ``out`` and returns the total output size and the iterator past the
+ end of the output range.
+ \endrst
+ */
+template <typename OutputIt, typename S, typename... Args,
+          bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value>
+inline auto format_to_n(OutputIt out, size_t n, const S& format_str,
+                        const Args&... args) ->
+    typename std::enable_if<enable, format_to_n_result<OutputIt>>::type {
+  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+  return vformat_to_n(out, n, to_string_view(format_str), vargs);
+}
+
+/**
+  Returns the number of characters in the output of
+  ``format(format_str, args...)``.
+ */
+template <typename... Args>
+inline size_t formatted_size(string_view format_str, Args&&... args) {
+  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+  detail::counting_buffer<> buf;
+  detail::vformat_to(buf, format_str, vargs);
+  return buf.count();
 }

 template <typename S, typename Char = char_t<S>>
@ -1832,7 +2072,7 @@ FMT_INLINE std::basic_string<Char> vformat(
 // std::basic_string<char_t<S>> to reduce the symbol size.
 template <typename S, typename... Args, typename Char = char_t<S>>
 FMT_INLINE std::basic_string<Char> format(const S& format_str, Args&&... args) {
-  const auto& vargs = detail::make_args_checked<Args...>(format_str, args...);
+  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
  return detail::vformat(to_string_view(format_str), vargs);
 }

@ -1852,7 +2092,7 @@ FMT_API void vprint(std::FILE*, string_view, format_args);
 */
 template <typename S, typename... Args, typename Char = char_t<S>>
 inline void print(std::FILE* f, const S& format_str, Args&&... args) {
-  const auto& vargs = detail::make_args_checked<Args...>(format_str, args...);
+  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
  return detail::is_unicode<Char>()
             ? vprint(f, to_string_view(format_str), vargs)
             : detail::vprint_mojibake(f, to_string_view(format_str), vargs);
@ -1871,7 +2111,7 @@ inline void print(std::FILE* f, const S& format_str, Args&&... args) {
 */
 template <typename S, typename... Args, typename Char = char_t<S>>
 inline void print(const S& format_str, Args&&... args) {
-  const auto& vargs = detail::make_args_checked<Args...>(format_str, args...);
+  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
  return detail::is_unicode<Char>()
             ? vprint(to_string_view(format_str), vargs)
             : detail::vprint_mojibake(stdout, to_string_view(format_str),
--- a/oss/fmt/include/fmt/format-inl.h
+++ b/oss/fmt/include/fmt/format-inl.h
--- a/oss/fmt/include/fmt/format.h
+++ b/oss/fmt/include/fmt/format.h
--- a/oss/fmt/include/fmt/locale.h
+++ b/oss/fmt/include/fmt/locale.h
@ -15,22 +15,12 @@
 FMT_BEGIN_NAMESPACE

 namespace detail {
-template <typename Char>
-typename buffer_context<Char>::iterator vformat_to(
-    const std::locale& loc, buffer<Char>& buf,
-    basic_string_view<Char> format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
-  using af = arg_formatter<typename buffer_context<Char>::iterator, Char>;
-  return vformat_to<af>(std::back_inserter(buf), to_string_view(format_str),
-                        args, detail::locale_ref(loc));
-}
-
 template <typename Char>
 std::basic_string<Char> vformat(
    const std::locale& loc, basic_string_view<Char> format_str,
    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
  basic_memory_buffer<Char> buffer;
-  detail::vformat_to(loc, buffer, format_str, args);
+  detail::vformat_to(buffer, format_str, args, detail::locale_ref(loc));
  return fmt::to_string(buffer);
 }
 }  // namespace detail
@ -45,32 +35,28 @@ inline std::basic_string<Char> vformat(
 template <typename S, typename... Args, typename Char = char_t<S>>
 inline std::basic_string<Char> format(const std::locale& loc,
                                      const S& format_str, Args&&... args) {
-  return detail::vformat(
-      loc, to_string_view(format_str),
-      detail::make_args_checked<Args...>(format_str, args...));
+  return detail::vformat(loc, to_string_view(format_str),
+                         fmt::make_args_checked<Args...>(format_str, args...));
 }

 template <typename S, typename OutputIt, typename... Args,
-          typename Char = enable_if_t<
-              detail::is_output_iterator<OutputIt>::value, char_t<S>>>
+          typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value)>
 inline OutputIt vformat_to(
    OutputIt out, const std::locale& loc, const S& format_str,
-    format_args_t<type_identity_t<OutputIt>, Char> args) {
-  using af = detail::arg_formatter<OutputIt, Char>;
-  return vformat_to<af>(out, to_string_view(format_str), args,
-                        detail::locale_ref(loc));
+    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  decltype(detail::get_buffer<Char>(out)) buf(detail::get_buffer_init(out));
+  vformat_to(buf, to_string_view(format_str), args, detail::locale_ref(loc));
+  return detail::get_iterator(buf);
 }

 template <typename OutputIt, typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt>::value&&
-                            detail::is_string<S>::value)>
-inline OutputIt format_to(OutputIt out, const std::locale& loc,
-                          const S& format_str, Args&&... args) {
-  detail::check_format_string<Args...>(format_str);
-  using context = format_context_t<OutputIt, char_t<S>>;
-  format_arg_store<context, Args...> as{args...};
-  return vformat_to(out, loc, to_string_view(format_str),
-                    basic_format_args<context>(as));
+          bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value>
+inline auto format_to(OutputIt out, const std::locale& loc,
+                      const S& format_str, Args&&... args) ->
+    typename std::enable_if<enable, OutputIt>::type {
+  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+  return vformat_to(out, loc, to_string_view(format_str), vargs);
 }

 FMT_END_NAMESPACE
--- a/oss/fmt/include/fmt/os.h
+++ b/oss/fmt/include/fmt/os.h
@ -29,7 +29,8 @@
 #if FMT_HAS_INCLUDE("winapifamily.h")
 #  include <winapifamily.h>
 #endif
-#if FMT_HAS_INCLUDE("fcntl.h") && \
+#if (FMT_HAS_INCLUDE(<fcntl.h>) || defined(__APPLE__) || \
+     defined(__linux__)) &&                              \
    (!defined(WINAPI_FAMILY) || (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
 #  include <fcntl.h>  // for O_RDONLY
 #  define FMT_USE_FCNTL 1
@ -278,7 +279,8 @@ class file {
    RDONLY = FMT_POSIX(O_RDONLY),  // Open for reading only.
    WRONLY = FMT_POSIX(O_WRONLY),  // Open for writing only.
    RDWR = FMT_POSIX(O_RDWR),      // Open for reading and writing.
-    CREATE = FMT_POSIX(O_CREAT)    // Create if the file doesn't exist.
+    CREATE = FMT_POSIX(O_CREAT),   // Create if the file doesn't exist.
+    APPEND = FMT_POSIX(O_APPEND)   // Open in append mode.
  };

  // Constructs a file object which doesn't represent any file.
@ -343,36 +345,69 @@ class file {
 // Returns the memory page size.
 long getpagesize();

-class direct_buffered_file;
+namespace detail {

-template <typename S, typename... Args>
-void print(direct_buffered_file& f, const S& format_str,
-           const Args&... args);
+struct buffer_size {
+  size_t value = 0;
+  buffer_size operator=(size_t val) const {
+    auto bs = buffer_size();
+    bs.value = val;
+    return bs;
+  }
+};

-// A buffered file with a direct buffer access and no synchronization.
-class direct_buffered_file {
+struct ostream_params {
+  int oflag = file::WRONLY | file::CREATE;
+  size_t buffer_size = BUFSIZ > 32768 ? BUFSIZ : 32768;
+
+  ostream_params() {}
+
+  template <typename... T>
+  ostream_params(T... params, int oflag) : ostream_params(params...) {
+    this->oflag = oflag;
+  }
+
+  template <typename... T>
+  ostream_params(T... params, detail::buffer_size bs)
+      : ostream_params(params...) {
+    this->buffer_size = bs.value;
+  }
+};
+}  // namespace detail
+
+static constexpr detail::buffer_size buffer_size;
+
+// A fast output stream which is not thread-safe.
+class ostream final : private detail::buffer<char> {
 private:
  file file_;

-  enum { buffer_size = 4096 };
-  char buffer_[buffer_size];
-  int pos_;
-
  void flush() {
-    if (pos_ == 0) return;
-    file_.write(buffer_, pos_);
-    pos_ = 0;
+    if (size() == 0) return;
+    file_.write(data(), size());
+    clear();
  }

-  int free_capacity() const { return buffer_size - pos_; }
+  FMT_API void grow(size_t) override final;
+
+  ostream(cstring_view path, const detail::ostream_params& params)
+      : file_(path, params.oflag) {
+    set(new char[params.buffer_size], params.buffer_size);
+  }

 public:
-  direct_buffered_file(cstring_view path, int oflag)
-    : file_(path, oflag), pos_(0) {}
-
-  ~direct_buffered_file() {
-    flush();
+  ostream(ostream&& other)
+      : detail::buffer<char>(other.data(), other.size(), other.capacity()),
+        file_(std::move(other.file_)) {
+    other.set(nullptr, 0);
  }
+  ~ostream() {
+    flush();
+    delete[] data();
+  }
+
+  template <typename... T>
+  friend ostream output_file(cstring_view path, T... params);

  void close() {
    flush();
@ -380,25 +415,20 @@ class direct_buffered_file {
  }

  template <typename S, typename... Args>
-  friend void print(direct_buffered_file& f, const S& format_str,
-                    const Args&... args) {
-    // We could avoid double buffering.
-    auto buf = fmt::memory_buffer();
-    fmt::format_to(std::back_inserter(buf), format_str, args...);
-    auto remaining_pos = 0;
-    auto remaining_size = buf.size();
-    while (remaining_size > detail::to_unsigned(f.free_capacity())) {
-      auto size = f.free_capacity();
-      memcpy(f.buffer_ + f.pos_, buf.data() + remaining_pos, size);
-      f.pos_ += size;
-      f.flush();
-      remaining_pos += size;
-      remaining_size -= size;
-    }
-    memcpy(f.buffer_ + f.pos_, buf.data() + remaining_pos, remaining_size);
-    f.pos_ += static_cast<int>(remaining_size);
+  void print(const S& format_str, const Args&... args) {
+    format_to(detail::buffer_appender<char>(*this), format_str, args...);
  }
 };
+
+/**
+  Opens a file for writing. Supported parameters passed in `params`:
+  * ``<integer>``: Output flags (``file::WRONLY | file::CREATE`` by default)
+  * ``buffer_size=<integer>``: Output buffer size
+ */
+template <typename... T>
+inline ostream output_file(cstring_view path, T... params) {
+  return {path, detail::ostream_params(params...)};
+}
 #endif  // FMT_USE_FCNTL

 #ifdef FMT_LOCALE
--- a/oss/fmt/include/fmt/ostream.h
+++ b/oss/fmt/include/fmt/ostream.h
@ -49,17 +49,27 @@ template <class Char> class formatbuf : public std::basic_streambuf<Char> {
  }
 };

+struct converter {
+  template <typename T, FMT_ENABLE_IF(is_integral<T>::value)> converter(T);
+};
+
 template <typename Char> struct test_stream : std::basic_ostream<Char> {
 private:
-  // Hide all operator<< from std::basic_ostream<Char>.
-  void_t<> operator<<(null<>);
-  void_t<> operator<<(const Char*);
-
-  template <typename T, FMT_ENABLE_IF(std::is_convertible<T, int>::value &&
-                                      !std::is_enum<T>::value)>
-  void_t<> operator<<(T);
+  void_t<> operator<<(converter);
 };

+// Hide insertion operators for built-in types.
+template <typename Char, typename Traits>
+void_t<> operator<<(std::basic_ostream<Char, Traits>&, Char);
+template <typename Char, typename Traits>
+void_t<> operator<<(std::basic_ostream<Char, Traits>&, char);
+template <typename Traits>
+void_t<> operator<<(std::basic_ostream<char, Traits>&, char);
+template <typename Traits>
+void_t<> operator<<(std::basic_ostream<char, Traits>&, signed char);
+template <typename Traits>
+void_t<> operator<<(std::basic_ostream<char, Traits>&, unsigned char);
+
 // Checks if T has a user-defined operator<< (e.g. not a member of
 // std::ostream).
 template <typename T, typename Char> class is_streamable {
@ -103,7 +113,7 @@ void format_value(buffer<Char>& buf, const T& value,
 #endif
  output << value;
  output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
-  buf.resize(buf.size());
+  buf.try_resize(buf.size());
 }

 // Formats an object of type T that has an overloaded ostream operator<<.
@ -160,7 +170,7 @@ template <typename S, typename... Args,
          typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
 void print(std::basic_ostream<Char>& os, const S& format_str, Args&&... args) {
  vprint(os, to_string_view(format_str),
-         detail::make_args_checked<Args...>(format_str, args...));
+         fmt::make_args_checked<Args...>(format_str, args...));
 }
 FMT_END_NAMESPACE

--- a/oss/fmt/include/fmt/printf.h
+++ b/oss/fmt/include/fmt/printf.h
@ -181,7 +181,7 @@ template <typename Char> class printf_width_handler {
 template <typename Char, typename Context>
 void vprintf(buffer<Char>& buf, basic_string_view<Char> format,
             basic_format_args<Context> args) {
-  Context(std::back_inserter(buf), format, args).format();
+  Context(buffer_appender<Char>(buf), format, args).format();
 }
 }  // namespace detail

@ -598,7 +598,7 @@ OutputIt basic_printf_context<OutputIt, Char>::format() {

 template <typename Char>
 using basic_printf_context_t =
-    basic_printf_context<std::back_insert_iterator<detail::buffer<Char>>, Char>;
+    basic_printf_context<detail::buffer_appender<Char>, Char>;

 using printf_context = basic_printf_context_t<char>;
 using wprintf_context = basic_printf_context_t<wchar_t>;
--- a/oss/fmt/include/fmt/ranges.h
+++ b/oss/fmt/include/fmt/ranges.h
@ -157,6 +157,9 @@ template <class Tuple, class F> void for_each(Tuple&& tup, F&& f) {
  for_each(indexes, std::forward<Tuple>(tup), std::forward<F>(f));
 }

+template <typename Range>
+using value_type = remove_cvref_t<decltype(*std::declval<Range>().begin())>;
+
 template <typename Arg, FMT_ENABLE_IF(!is_like_std_string<
                                      typename std::decay<Arg>::type>::value)>
 FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const Arg&) {
@ -182,7 +185,6 @@ FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const char) {
 FMT_CONSTEXPR const wchar_t* format_str_quoted(bool add_space, const wchar_t) {
  return add_space ? L" '{}'" : L"'{}'";
 }
-
 }  // namespace detail

 template <typename T> struct is_tuple_like {
@ -246,9 +248,18 @@ template <typename T, typename Char> struct is_range {
      !std::is_constructible<detail::std_string_view<Char>, T>::value;
 };

-template <typename RangeT, typename Char>
-struct formatter<RangeT, Char,
-                 enable_if_t<fmt::is_range<RangeT, Char>::value>> {
+template <typename T, typename Char>
+struct formatter<
+    T, Char,
+    enable_if_t<fmt::is_range<T, Char>::value
+// Workaround a bug in MSVC 2017 and earlier.
+#if !FMT_MSC_VER || FMT_MSC_VER >= 1927
+                &&
+                (has_formatter<detail::value_type<T>, format_context>::value ||
+                 detail::has_fallback_formatter<detail::value_type<T>,
+                                                format_context>::value)
+#endif
+                >> {
  formatting_range<Char> formatting;

  template <typename ParseContext>
@ -257,8 +268,7 @@ struct formatter<RangeT, Char,
  }

  template <typename FormatContext>
-  typename FormatContext::iterator format(const RangeT& values,
-                                          FormatContext& ctx) {
+  typename FormatContext::iterator format(const T& values, FormatContext& ctx) {
    auto out = detail::copy(formatting.prefix, ctx.out());
    size_t i = 0;
    auto it = values.begin();
--- a/oss/fmt/src/format.cc
+++ b/oss/fmt/src/format.cc
@ -23,6 +23,36 @@ int format_float(char* buf, std::size_t size, const char* format, int precision,
  return precision < 0 ? snprintf_ptr(buf, size, format, value)
                       : snprintf_ptr(buf, size, format, precision, value);
 }
+
+template FMT_API dragonbox::decimal_fp<float> dragonbox::to_decimal(float x)
+    FMT_NOEXCEPT;
+template FMT_API dragonbox::decimal_fp<double> dragonbox::to_decimal(double x)
+    FMT_NOEXCEPT;
+
+// DEPRECATED! This function exists for ABI compatibility.
+template <typename Char>
+typename basic_format_context<std::back_insert_iterator<buffer<Char>>,
+                              Char>::iterator
+vformat_to(buffer<Char>& buf, basic_string_view<Char> format_str,
+           basic_format_args<basic_format_context<
+               std::back_insert_iterator<buffer<type_identity_t<Char>>>,
+               type_identity_t<Char>>>
+               args) {
+  using iterator = std::back_insert_iterator<buffer<char>>;
+  using context = basic_format_context<
+      std::back_insert_iterator<buffer<type_identity_t<Char>>>,
+      type_identity_t<Char>>;
+  auto out = iterator(buf);
+  format_handler<iterator, Char, context> h(out, format_str, args, {});
+  parse_format_string<false>(format_str, h);
+  return out;
+}
+template basic_format_context<std::back_insert_iterator<buffer<char>>,
+                              char>::iterator
+vformat_to(buffer<char>&, string_view,
+           basic_format_args<basic_format_context<
+               std::back_insert_iterator<buffer<type_identity_t<char>>>,
+               type_identity_t<char>>>);
 }  // namespace detail

 template struct FMT_INSTANTIATION_DEF_API detail::basic_data<void>;
@ -44,9 +74,9 @@ template FMT_API char detail::decimal_point_impl(locale_ref);

 template FMT_API void detail::buffer<char>::append(const char*, const char*);

-template FMT_API FMT_BUFFER_CONTEXT(char)::iterator detail::vformat_to(
+template FMT_API void detail::vformat_to(
    detail::buffer<char>&, string_view,
-    basic_format_args<FMT_BUFFER_CONTEXT(char)>);
+    basic_format_args<FMT_BUFFER_CONTEXT(char)>, detail::locale_ref);

 template FMT_API int detail::snprintf_float(double, int, detail::float_specs,
                                            detail::buffer<char>&);
--- a/oss/fmt/src/os.cc
+++ b/oss/fmt/src/os.cc
@ -62,7 +62,7 @@ using RWResult = int;
 inline unsigned convert_rwcount(std::size_t count) {
  return count <= UINT_MAX ? static_cast<unsigned>(count) : UINT_MAX;
 }
-#else
+#elif FMT_USE_FCNTL
 // Return type of read and write functions.
 using RWResult = ssize_t;

@ -124,7 +124,8 @@ void detail::format_windows_error(detail::buffer<char>& out, int error_code,
      if (result != 0) {
        utf16_to_utf8 utf8_message;
        if (utf8_message.convert(system_message) == ERROR_SUCCESS) {
-          format_to(std::back_inserter(out), "{}: {}", message, utf8_message);
+          format_to(buffer_appender<char>(out), "{}: {}", message,
+                    utf8_message);
          return;
        }
        break;
@ -288,12 +289,12 @@ void file::pipe(file& read_end, file& write_end) {
 }

 buffered_file file::fdopen(const char* mode) {
-  // Don't retry as fdopen doesn't return EINTR.
-  #if defined(__MINGW32__) && defined(_POSIX_)
+// Don't retry as fdopen doesn't return EINTR.
+#  if defined(__MINGW32__) && defined(_POSIX_)
  FILE* f = ::fdopen(fd_, mode);
-  #else
+#  else
  FILE* f = FMT_POSIX_CALL(fdopen(fd_, mode));
-  #endif
+#  endif
  if (!f)
    FMT_THROW(
        system_error(errno, "cannot associate stream with file descriptor"));
@ -313,5 +314,9 @@ long getpagesize() {
  return size;
 #  endif
 }
+
+FMT_API void ostream::grow(size_t) {
+  if (this->size() == this->capacity()) flush();
+}
 #endif  // FMT_USE_FCNTL
 FMT_END_NAMESPACE
--- a/res/Cascadia.ttf
+++ b/res/Cascadia.ttf
--- a/res/CascadiaMono.ttf
+++ b/res/CascadiaMono.ttf
--- a/res/README.md
+++ b/res/README.md
@ -17,5 +17,5 @@ Please consult the [license](https://raw.githubusercontent.com/microsoft/cascadi

 ### Fonts Included

-* Cascadia Code, Cascadia Mono (2102.03)
-   * from microsoft/cascadia-code@b358d1ba3d1629c113671312b18eab52797cc055
+* Cascadia Code, Cascadia Mono (2102.25)
+   * from microsoft/cascadia-code@911dc421f333e3b72b97381d16fee5b71eb48f04
--- a/res/terminal/images-Dev/SplashScreen.scale-100.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-100.png
--- a/res/terminal/images-Dev/SplashScreen.scale-100_contrast-black.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-100_contrast-black.png
--- a/res/terminal/images-Dev/SplashScreen.scale-100_contrast-white.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-100_contrast-white.png
--- a/res/terminal/images-Dev/SplashScreen.scale-125.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-125.png
--- a/res/terminal/images-Dev/SplashScreen.scale-125_contrast-black.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-125_contrast-black.png
--- a/res/terminal/images-Dev/SplashScreen.scale-125_contrast-white.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-125_contrast-white.png
--- a/res/terminal/images-Dev/SplashScreen.scale-150.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-150.png
--- a/res/terminal/images-Dev/SplashScreen.scale-150_contrast-black.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-150_contrast-black.png
--- a/res/terminal/images-Dev/SplashScreen.scale-150_contrast-white.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-150_contrast-white.png
--- a/res/terminal/images-Dev/SplashScreen.scale-200.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-200.png
--- a/res/terminal/images-Dev/SplashScreen.scale-200_contrast-black.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-200_contrast-black.png
--- a/res/terminal/images-Dev/SplashScreen.scale-200_contrast-white.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-200_contrast-white.png
--- a/res/terminal/images-Dev/SplashScreen.scale-400.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-400.png
--- a/res/terminal/images-Dev/SplashScreen.scale-400_contrast-black.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-400_contrast-black.png
--- a/res/terminal/images-Dev/SplashScreen.scale-400_contrast-white.png
+++ b/res/terminal/images-Dev/SplashScreen.scale-400_contrast-white.png
--- a/res/terminal/images-Pre/SplashScreen.scale-100.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-100.png
--- a/res/terminal/images-Pre/SplashScreen.scale-100_contrast-black.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-100_contrast-black.png
--- a/res/terminal/images-Pre/SplashScreen.scale-100_contrast-white.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-100_contrast-white.png
--- a/res/terminal/images-Pre/SplashScreen.scale-125.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-125.png
--- a/res/terminal/images-Pre/SplashScreen.scale-125_contrast-black.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-125_contrast-black.png
--- a/res/terminal/images-Pre/SplashScreen.scale-125_contrast-white.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-125_contrast-white.png
--- a/res/terminal/images-Pre/SplashScreen.scale-150.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-150.png
--- a/res/terminal/images-Pre/SplashScreen.scale-150_contrast-black.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-150_contrast-black.png
--- a/res/terminal/images-Pre/SplashScreen.scale-150_contrast-white.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-150_contrast-white.png
--- a/res/terminal/images-Pre/SplashScreen.scale-200.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-200.png
--- a/res/terminal/images-Pre/SplashScreen.scale-200_contrast-black.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-200_contrast-black.png
--- a/res/terminal/images-Pre/SplashScreen.scale-200_contrast-white.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-200_contrast-white.png
--- a/res/terminal/images-Pre/SplashScreen.scale-400.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-400.png
--- a/res/terminal/images-Pre/SplashScreen.scale-400_contrast-black.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-400_contrast-black.png
--- a/res/terminal/images-Pre/SplashScreen.scale-400_contrast-white.png
+++ b/res/terminal/images-Pre/SplashScreen.scale-400_contrast-white.png
--- a/res/terminal/images/SplashScreen.scale-100.png
+++ b/res/terminal/images/SplashScreen.scale-100.png
--- a/res/terminal/images/SplashScreen.scale-100_contrast-black.png
+++ b/res/terminal/images/SplashScreen.scale-100_contrast-black.png
--- a/res/terminal/images/SplashScreen.scale-100_contrast-white.png
+++ b/res/terminal/images/SplashScreen.scale-100_contrast-white.png
--- a/res/terminal/images/SplashScreen.scale-125.png
+++ b/res/terminal/images/SplashScreen.scale-125.png
--- a/res/terminal/images/SplashScreen.scale-125_contrast-black.png
+++ b/res/terminal/images/SplashScreen.scale-125_contrast-black.png
--- a/res/terminal/images/SplashScreen.scale-125_contrast-white.png
+++ b/res/terminal/images/SplashScreen.scale-125_contrast-white.png
--- a/res/terminal/images/SplashScreen.scale-150.png
+++ b/res/terminal/images/SplashScreen.scale-150.png
--- a/res/terminal/images/SplashScreen.scale-150_contrast-black.png
+++ b/res/terminal/images/SplashScreen.scale-150_contrast-black.png
--- a/res/terminal/images/SplashScreen.scale-150_contrast-white.png
+++ b/res/terminal/images/SplashScreen.scale-150_contrast-white.png
--- a/res/terminal/images/SplashScreen.scale-200.png
+++ b/res/terminal/images/SplashScreen.scale-200.png
--- a/res/terminal/images/SplashScreen.scale-200_contrast-black.png
+++ b/res/terminal/images/SplashScreen.scale-200_contrast-black.png
--- a/res/terminal/images/SplashScreen.scale-200_contrast-white.png
+++ b/res/terminal/images/SplashScreen.scale-200_contrast-white.png
--- a/res/terminal/images/SplashScreen.scale-400.png
+++ b/res/terminal/images/SplashScreen.scale-400.png
--- a/res/terminal/images/SplashScreen.scale-400_contrast-black.png
+++ b/res/terminal/images/SplashScreen.scale-400_contrast-black.png
--- a/res/terminal/images/SplashScreen.scale-400_contrast-white.png
+++ b/res/terminal/images/SplashScreen.scale-400_contrast-white.png
--- a/src/ConsolePerf.wprp
+++ b/src/ConsolePerf.wprp
@ -43,6 +43,7 @@
        <EventProvider Id="EventProvider-Microsoft.Windows.Console.Server" Name="1A541C01-589A-496E-85A7-A9E02170166D"/>
        <EventProvider Id="EventProvider-Microsoft.Windows.Console.VirtualTerminal.Parser" Name="c9ba2a84-d3ca-5e19-2bd6-776a0910cb9d"/>
        <EventProvider Id="EventProvider-Microsoft.Windows.Console.Render.VtEngine" Name="c9ba2a95-d3ca-5e19-2bd6-776a0910cb9d"/>
+        <EventProvider Id="EventProvider-Microsoft.Windows.Console.UIA" Name="e7ebce59-2161-572d-b263-2f16a6afb9e5"/>
        <!-- Now define some profiles. We'll call them by ID when collecting. Also, the Base is where it is inheriting from and is a .wprpi file built... -->
        <!-- ... into WPR automatically. Go look in the WPR install directory or in the documentation to find it. -->
        <Profile Id="ConsolePerfProfile.Verbose.File" Base="GeneralProfile.Light.File" LoggingMode="File" Name="ConsolePerfProfile" DetailLevel="Verbose" Description="Console Performance default profile">
@ -66,6 +67,7 @@
                        <EventProviderId Value="EventProvider-Microsoft.Windows.Console.Server"/>
                        <EventProviderId Value="EventProvider-Microsoft.Windows.Console.VirtualTerminal.Parser"/>
                        <EventProviderId Value="EventProvider-Microsoft.Windows.Console.Render.VtEngine"/>
+                        <EventProviderId Value="EventProvider-Microsoft.Windows.Console.UIA"/>
                    </EventProviders>
                </EventCollectorId>
            </Collectors>
--- a/src/buffer/out/textBuffer.cpp
+++ b/src/buffer/out/textBuffer.cpp
@ -281,9 +281,9 @@ bool TextBuffer::_AssertValidDoubleByteSequence(const DbcsAttribute dbcsAttribut
 // - false otherwise (out of memory)
 bool TextBuffer::_PrepareForDoubleByteSequence(const DbcsAttribute dbcsAttribute)
 {
-    // Assert the buffer state is ready for this character
-    // This function corrects most errors. If this is false, we had an uncorrectable one.
-    FAIL_FAST_IF(!(_AssertValidDoubleByteSequence(dbcsAttribute))); // Shouldn't be uncorrectable sequences unless something is very wrong.
+    // This function corrects most errors. If this is false, we had an uncorrectable one which
+    // older versions of conhost simply let pass by unflinching.
+    LOG_HR_IF(E_NOT_VALID_STATE, !(_AssertValidDoubleByteSequence(dbcsAttribute))); // Shouldn't be uncorrectable sequences unless something is very wrong.

    bool fSuccess = true;
    // Now compensate if we don't have enough space for the upcoming double byte sequence
--- a/src/cascadia/CascadiaPackage/Package-Dev.appxmanifest
+++ b/src/cascadia/CascadiaPackage/Package-Dev.appxmanifest
@ -54,7 +54,6 @@
            <uap:ShowOn Tile="square310x310Logo"/>
          </uap:ShowNameOnTiles>
        </uap:DefaultTile>
-        <uap:SplashScreen Image="Images\SplashScreen.png"/>
      </uap:VisualElements>

      <Extensions>
@ -78,17 +77,17 @@
        <com:Extension Category="windows.comServer">
            <com:ComServer>
                <com:SurrogateServer DisplayName="WindowsTerminalShellExt">
-                    <com:Class Id="9f156763-7844-4dc4-b2b1-901f640f5155" Path="WindowsTerminalShellExt.dll" ThreadingModel="STA"/>
+                    <com:Class Id="52065414-e077-47ec-a3ac-1cc5455e1b54" Path="WindowsTerminalShellExt.dll" ThreadingModel="STA"/>
                </com:SurrogateServer>
            </com:ComServer>
        </com:Extension>
        <desktop4:Extension Category="windows.fileExplorerContextMenus">
            <desktop4:FileExplorerContextMenus>
                <desktop5:ItemType Type="Directory">
-                    <desktop5:Verb Id="Command1" Clsid="9f156763-7844-4dc4-b2b1-901f640f5155" />
+                    <desktop5:Verb Id="OpenTerminalDev" Clsid="52065414-e077-47ec-a3ac-1cc5455e1b54" />
                </desktop5:ItemType>
                <desktop5:ItemType Type="Directory\Background">
-                  <desktop5:Verb Id="Command2" Clsid="9f156763-7844-4dc4-b2b1-901f640f5155" />
+                  <desktop5:Verb Id="OpenTerminalDev" Clsid="52065414-e077-47ec-a3ac-1cc5455e1b54" />
                </desktop5:ItemType>                
            </desktop4:FileExplorerContextMenus>
        </desktop4:Extension>
--- a/src/cascadia/CascadiaPackage/Package-Pre.appxmanifest
+++ b/src/cascadia/CascadiaPackage/Package-Pre.appxmanifest
@ -55,7 +55,6 @@
            <uap:ShowOn Tile="square310x310Logo"/>
          </uap:ShowNameOnTiles>
        </uap:DefaultTile>
-        <uap:SplashScreen Image="Images\SplashScreen.png"/>
      </uap:VisualElements>

      <Extensions>
@ -78,17 +77,17 @@
        <com:Extension Category="windows.comServer">
            <com:ComServer>
                <com:SurrogateServer DisplayName="WindowsTerminalShellExt">
-                    <com:Class Id="9f156763-7844-4dc4-b2b1-901f640f5155" Path="WindowsTerminalShellExt.dll" ThreadingModel="STA"/>
+                    <com:Class Id="02db545a-3e20-46de-83a5-1329b1e88b6b" Path="WindowsTerminalShellExt.dll" ThreadingModel="STA"/>
                </com:SurrogateServer>
            </com:ComServer>
        </com:Extension>
        <desktop4:Extension Category="windows.fileExplorerContextMenus">
            <desktop4:FileExplorerContextMenus>
                <desktop5:ItemType Type="Directory">
-                    <desktop5:Verb Id="Command1" Clsid="9f156763-7844-4dc4-b2b1-901f640f5155" />
+                    <desktop5:Verb Id="OpenTerminalPre" Clsid="02db545a-3e20-46de-83a5-1329b1e88b6b" />
                </desktop5:ItemType>
                <desktop5:ItemType Type="Directory\Background">
-                  <desktop5:Verb Id="Command2" Clsid="9f156763-7844-4dc4-b2b1-901f640f5155" />
+                  <desktop5:Verb Id="OpenTerminalPre" Clsid="02db545a-3e20-46de-83a5-1329b1e88b6b" />
                </desktop5:ItemType>
            </desktop4:FileExplorerContextMenus>
        </desktop4:Extension>
--- a/src/cascadia/CascadiaPackage/Package.appxmanifest
+++ b/src/cascadia/CascadiaPackage/Package.appxmanifest
@ -55,7 +55,6 @@
            <uap:ShowOn Tile="square310x310Logo"/>
          </uap:ShowNameOnTiles>
        </uap:DefaultTile>
-        <uap:SplashScreen Image="Images\SplashScreen.png"/>
      </uap:VisualElements>

      <Extensions>
@ -86,10 +85,10 @@
        <desktop4:Extension Category="windows.fileExplorerContextMenus">
            <desktop4:FileExplorerContextMenus>
                <desktop5:ItemType Type="Directory">
-                    <desktop5:Verb Id="Command1" Clsid="9f156763-7844-4dc4-b2b1-901f640f5155" />
+                    <desktop5:Verb Id="OpenTerminalHere" Clsid="9f156763-7844-4dc4-b2b1-901f640f5155" />
                </desktop5:ItemType>
                <desktop5:ItemType Type="Directory\Background">
-                  <desktop5:Verb Id="Command2" Clsid="9f156763-7844-4dc4-b2b1-901f640f5155" />
+                  <desktop5:Verb Id="OpenTerminalHere" Clsid="9f156763-7844-4dc4-b2b1-901f640f5155" />
                </desktop5:ItemType>
            </desktop4:FileExplorerContextMenus>
        </desktop4:Extension>
--- a/src/cascadia/LocalTests_SettingsModel/DeserializationTests.cpp
+++ b/src/cascadia/LocalTests_SettingsModel/DeserializationTests.cpp
@ -79,6 +79,7 @@ namespace SettingsModelLocalTests
        TEST_METHOD(TestCommandsAndKeybindings);

        TEST_METHOD(TestNestedCommandWithoutName);
+        TEST_METHOD(TestNestedCommandWithBadSubCommands);
        TEST_METHOD(TestUnbindNestedCommand);
        TEST_METHOD(TestRebindNestedCommand);

@ -1376,7 +1377,7 @@ namespace SettingsModelLocalTests
                },
                {
                    "name": "parent",
-                    "commands": [                        
+                    "commands": [
                        { "command": { "action": "setColorScheme", "colorScheme": "invalidScheme" } }
                    ]
                }
@ -1403,11 +1404,11 @@ namespace SettingsModelLocalTests
                },
                {
                    "name": "grandparent",
-                    "commands": [                        
+                    "commands": [
                        {
                            "name": "parent",
                            "commands": [
-                                { 
+                                {
                                    "command": { "action": "setColorScheme", "colorScheme": "invalidScheme" }
                                }
                            ]
@ -1909,7 +1910,8 @@ namespace SettingsModelLocalTests
            "keybindings": [
                { "command": { "action": "splitPane", "split":"auto" }, "keys": [ "ctrl+alt+t", "ctrl+a" ] },
                { "command": { "action": "moveFocus" }, "keys": [ "ctrl+a" ] },
-                { "command": { "action": "resizePane" }, "keys": [ "ctrl+b" ] }
+                { "command": { "action": "resizePane" }, "keys": [ "ctrl+b" ] },
+                { "name": "invalid nested", "commands":[ { "name" : "hello" }, { "name" : "world" } ] }
            ]
        })" };

@ -1918,18 +1920,20 @@ namespace SettingsModelLocalTests

        VERIFY_ARE_EQUAL(0u, settings->_globals->_keymap->_keyShortcuts.size());

-        VERIFY_ARE_EQUAL(3u, settings->_globals->_keybindingsWarnings.size());
+        VERIFY_ARE_EQUAL(4u, settings->_globals->_keybindingsWarnings.size());
        VERIFY_ARE_EQUAL(SettingsLoadWarnings::TooManyKeysForChord, settings->_globals->_keybindingsWarnings.at(0));
        VERIFY_ARE_EQUAL(SettingsLoadWarnings::MissingRequiredParameter, settings->_globals->_keybindingsWarnings.at(1));
        VERIFY_ARE_EQUAL(SettingsLoadWarnings::MissingRequiredParameter, settings->_globals->_keybindingsWarnings.at(2));
+        VERIFY_ARE_EQUAL(SettingsLoadWarnings::FailedToParseSubCommands, settings->_globals->_keybindingsWarnings.at(3));

        settings->_ValidateKeybindings();

-        VERIFY_ARE_EQUAL(4u, settings->_warnings.Size());
+        VERIFY_ARE_EQUAL(5u, settings->_warnings.Size());
        VERIFY_ARE_EQUAL(SettingsLoadWarnings::AtLeastOneKeybindingWarning, settings->_warnings.GetAt(0));
        VERIFY_ARE_EQUAL(SettingsLoadWarnings::TooManyKeysForChord, settings->_warnings.GetAt(1));
        VERIFY_ARE_EQUAL(SettingsLoadWarnings::MissingRequiredParameter, settings->_warnings.GetAt(2));
        VERIFY_ARE_EQUAL(SettingsLoadWarnings::MissingRequiredParameter, settings->_warnings.GetAt(3));
+        VERIFY_ARE_EQUAL(SettingsLoadWarnings::FailedToParseSubCommands, settings->_warnings.GetAt(4));
    }

    void DeserializationTests::ValidateExecuteCommandlineWarning()
@ -2316,6 +2320,53 @@ namespace SettingsModelLocalTests
        VERIFY_ARE_EQUAL(0u, commands.Size());
    }

+    void DeserializationTests::TestNestedCommandWithBadSubCommands()
+    {
+        // This test tests a nested command without a name specified. This type
+        // of command should just be ignored, since we can't auto-generate names
+        // for nested commands, they _must_ have names specified.
+
+        const std::string settingsJson{ R"(
+        {
+            "defaultProfile": "{6239a42c-0000-49a3-80bd-e8fdd045185c}",
+            "profiles": [
+                {
+                    "name": "profile0",
+                    "guid": "{6239a42c-0000-49a3-80bd-e8fdd045185c}",
+                    "historySize": 1,
+                    "commandline": "cmd.exe"
+                }
+            ],
+            "actions": [
+                {
+                    "name": "nested command",
+                    "commands": [
+                        {
+                            "name": "child1"
+                        },
+                        {
+                            "name": "child2"
+                        }
+                    ]
+                },
+            ],
+            "schemes": [ { "name": "Campbell" } ] // This is included here to prevent settings validation errors.
+        })" };
+
+        VerifyParseSucceeded(settingsJson);
+
+        auto settings = winrt::make_self<implementation::CascadiaSettings>();
+        settings->_ParseJsonString(settingsJson, false);
+        settings->LayerJson(settings->_userSettings);
+        auto commands = settings->_globals->Commands();
+        settings->_ValidateSettings();
+
+        VERIFY_ARE_EQUAL(2u, settings->_warnings.Size());
+        VERIFY_ARE_EQUAL(SettingsLoadWarnings::AtLeastOneKeybindingWarning, settings->_warnings.GetAt(0));
+        VERIFY_ARE_EQUAL(SettingsLoadWarnings::FailedToParseSubCommands, settings->_warnings.GetAt(1));
+        VERIFY_ARE_EQUAL(0u, commands.Size());
+    }
+
    void DeserializationTests::TestUnbindNestedCommand()
    {
        // Test that layering a command with `"commands": null` set will unbind a command that already exists.
--- a/src/cascadia/Remoting/WindowActivatedArgs.h
+++ b/src/cascadia/Remoting/WindowActivatedArgs.h
@ -28,7 +28,7 @@ namespace winrt::Microsoft::Terminal::Remoting::implementation
    struct WindowActivatedArgs : public WindowActivatedArgsT<WindowActivatedArgs>
    {
        GETSET_PROPERTY(uint64_t, PeasantID, 0);
-        GETSET_PROPERTY(winrt::guid, DesktopID, {});
+        GETSET_PROPERTY(winrt::guid, DesktopID);
        GETSET_PROPERTY(winrt::Windows::Foundation::DateTime, ActivatedTime, {});
        GETSET_PROPERTY(uint64_t, Hwnd, 0);

--- a/src/cascadia/Remoting/packages.config
+++ b/src/cascadia/Remoting/packages.config
@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Microsoft.Windows.CppWinRT" version="2.0.201017.1" targetFramework="native" />
+  <package id="Microsoft.Windows.CppWinRT" version="2.0.210309.3" targetFramework="native" />
 </packages>
--- a/src/cascadia/ShellExtension/OpenTerminalHere.cpp
+++ b/src/cascadia/ShellExtension/OpenTerminalHere.cpp
@ -56,7 +56,7 @@ HRESULT OpenTerminalHere::Invoke(IShellItemArray* psiItemArray,
        siEx.StartupInfo.cb = sizeof(STARTUPINFOEX);

        // Append a "\." to the given path, so that this will work in "C:\"
-        std::wstring cmdline = fmt::format(L"\"{}\" -d \"{}\\.\"", GetWtExePath(), pszName.get());
+        auto cmdline{ wil::str_printf<std::wstring>(LR"-("%s" -d "%s\.")-", GetWtExePath().c_str(), pszName.get()) };
        RETURN_IF_WIN32_BOOL_FALSE(CreateProcessW(
            nullptr,
            cmdline.data(),
--- a/src/cascadia/ShellExtension/OpenTerminalHere.h
+++ b/src/cascadia/ShellExtension/OpenTerminalHere.h
@ -27,8 +27,15 @@ Author(s):

 using namespace Microsoft::WRL;

-struct __declspec(uuid("9f156763-7844-4dc4-b2b1-901f640f5155"))
-    OpenTerminalHere : public RuntimeClass<RuntimeClassFlags<ClassicCom | InhibitFtmBase>, IExplorerCommand>
+struct
+#if defined(WT_BRANDING_RELEASE)
+    __declspec(uuid("9f156763-7844-4dc4-b2b1-901f640f5155"))
+#elif defined(WT_BRANDING_PREVIEW)
+    __declspec(uuid("02db545a-3e20-46de-83a5-1329b1e88b6b"))
+#else // DEV
+    __declspec(uuid("52065414-e077-47ec-a3ac-1cc5455e1b54"))
+#endif
+        OpenTerminalHere : public RuntimeClass<RuntimeClassFlags<ClassicCom | InhibitFtmBase>, IExplorerCommand>
 {
 #pragma region IExplorerCommand
    STDMETHODIMP Invoke(IShellItemArray* psiItemArray,
--- a/src/cascadia/ShellExtension/PlaceholderType.cpp
+++ b/src/cascadia/ShellExtension/PlaceholderType.cpp
@ -1,10 +0,0 @@
-// Copyright (c) Microsoft Corporation.
-// Licensed under the MIT license.
-
-#include "pch.h"
-#include "PlaceholderType.h"
-#include "PlaceholderType.g.cpp"
-
-namespace winrt::Microsoft::Terminal::ShellExtension::implementation
-{
-}
--- a/src/cascadia/ShellExtension/PlaceholderType.h
+++ b/src/cascadia/ShellExtension/PlaceholderType.h
@ -1,37 +0,0 @@
-/*++
-Copyright (c) Microsoft Corporation
-Licensed under the MIT license.
-
-Module Name:
- PlaceholderType.h
-
-Abstract:
- This class is just here to make our .wapproj play nicely with this project. If
-  we don't define any winrt types, then we won't generate a .winmd, and the
-  .wapproj will become _very_ mad at this project. So we'll use this placeholder
-  class just to trick cppwinrt into generating a winmd for us. If we ever _do_
-  add a real winrt type to this project, this can be removed.
-
-Author(s):
- Mike Griese - May 2020
-
--*/
-#pragma once
-
-#include <conattrs.hpp>
-#include "PlaceholderType.g.h"
-#include "../../cascadia/inc/cppwinrt_utils.h"
-
-namespace winrt::Microsoft::Terminal::ShellExtension::implementation
-{
-    struct PlaceholderType : PlaceholderTypeT<PlaceholderType>
-    {
-        PlaceholderType() = default;
-        GETSET_PROPERTY(int32_t, Placeholder, 42);
-    };
-}
-
-namespace winrt::Microsoft::Terminal::ShellExtension::factory_implementation
-{
-    BASIC_FACTORY(PlaceholderType);
-}
--- a/src/cascadia/ShellExtension/PlaceholderType.idl
+++ b/src/cascadia/ShellExtension/PlaceholderType.idl
@ -1,21 +0,0 @@
-// Copyright (c) Microsoft Corporation.
-// Licensed under the MIT license.
-
-// This class is just here to make our .wapproj play nicely with this project.
-// If we don't define any winrt types, then we won't generate a .winmd, and the
-// .wapproj will become _very_ mad at this project. So we'll use this
-// placeholder class just to trick cppwinrt into generating a winmd for us. If
-// we ever _do_ add a real winrt type to this project, this can be removed.
-
-namespace Microsoft.Terminal.ShellExtension
-{
-    [default_interface] runtimeclass PlaceholderType {
-        PlaceholderType();
-        Int32 Placeholder
-        {
-            get;
-            set;
-        };
-    };
-
-}
--- a/src/cascadia/ShellExtension/WindowsTerminalShellExt.def
+++ b/src/cascadia/ShellExtension/WindowsTerminalShellExt.def
@ -1,4 +1,4 @@
 EXPORTS
-DllCanUnloadNow = WINRT_CanUnloadNow                    PRIVATE
-DllGetActivationFactory = WINRT_GetActivationFactory    PRIVATE
+DllCanUnloadNow PRIVATE
+DllGetActivationFactory PRIVATE
 DllGetClassObject PRIVATE
--- a/Show more
+++ b/Show more