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Fixups to #17064 (#17065)

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Forget a line, and an empty batch is trivially linear.

c.f. #17064
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Erik Johnston 2024-04-08 14:55:19 +01:00 committed by GitHub
parent 1f8f991d51
commit 4d10a8fb18
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1
changelog.d/17065.bugfix Normal file
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@ -0,0 +1 @@
Fix various long-standing bugs which could cause incorrect state to be returned from `/sync` in certain situations.

3
synapse/handlers/sync.py
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@ -1272,8 +1272,11 @@ class SyncHandler:
for e in batch.events[1:]: for e in batch.events[1:]:
if e.prev_event_ids() != [prev_event_id]: if e.prev_event_ids() != [prev_event_id]:
break break
prev_event_id = e.event_id
else: else:
is_linear_timeline = True is_linear_timeline = True
else:
is_linear_timeline = True
if is_linear_timeline and not batch.limited: if is_linear_timeline and not batch.limited:
state_ids: StateMap[str] = {} state_ids: StateMap[str] = {}