From 2f4c8ebf13559bf774326908240cc19d62427af9 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 19 Dec 2017 19:58:28 -0800
Subject: [PATCH] Add regression test

---
 .../compiler/unionSignaturesWithThisParameter.ts    | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 tests/cases/compiler/unionSignaturesWithThisParameter.ts

diff --git a/tests/cases/compiler/unionSignaturesWithThisParameter.ts b/tests/cases/compiler/unionSignaturesWithThisParameter.ts
new file mode 100644
index 0000000000..c983ff1a99
--- /dev/null
+++ b/tests/cases/compiler/unionSignaturesWithThisParameter.ts
@@ -0,0 +1,13 @@
+// @strict: true
+
+// Repro from #20802
+
+function x<T>(ctor: {
+    (this: {}, v: T): void;
+    new(v: T): void;
+} | {
+    (v: T): void;
+    new(v: T): void;
+}, t: T) {
+    new ctor(t);
+}