From 519c501ea5d4830c5d6d4458a556e2083e2c03ce Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 18 Dec 2018 11:58:06 -0800
Subject: [PATCH] Add regression test

---
 .../cases/conformance/types/literal/literalTypeWidening.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tests/cases/conformance/types/literal/literalTypeWidening.ts b/tests/cases/conformance/types/literal/literalTypeWidening.ts
index 4c818793142..17daedb3b0e 100644
--- a/tests/cases/conformance/types/literal/literalTypeWidening.ts
+++ b/tests/cases/conformance/types/literal/literalTypeWidening.ts
@@ -127,3 +127,10 @@ export type LangCode = keyof typeof langCodeSet
 export const langCodes = keys(langCodeSet)
 
 const arr: Obj[] = langCodes.map(code => ({ code }))
+
+// Repro from #29081
+
+function test<T extends { a: string, b: string }>(obj: T): T {
+    let { a, ...rest } = obj;
+    return { a: 'hello', ...rest } as T;
+}