From 7f4d1ac475a776d2e7f1eecf8f312b438eff23d1 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Fri, 28 Dec 2018 09:38:19 -1000
Subject: [PATCH] Add regression test

---
 .../destructuringInitializerContextualTypeFromContext.ts | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tests/cases/compiler/destructuringInitializerContextualTypeFromContext.ts b/tests/cases/compiler/destructuringInitializerContextualTypeFromContext.ts
index 6153b1e3a80..6b109e22271 100644
--- a/tests/cases/compiler/destructuringInitializerContextualTypeFromContext.ts
+++ b/tests/cases/compiler/destructuringInitializerContextualTypeFromContext.ts
@@ -1,3 +1,5 @@
+// @strict: true
+
 interface SFC<P = {}> {
     (props: P & { children?: any }): any | null;
 }
@@ -16,4 +18,9 @@ const Child: SFC<Props> = ({
     children,
     name = "Artemis",
     ...props
-}) => `name: ${name} props: ${JSON.stringify(props)}`;
\ No newline at end of file
+}) => `name: ${name} props: ${JSON.stringify(props)}`;
+
+// Repro from #29189
+
+declare function f(g: (as: string[]) => void): void
+f(([_1, _2 = undefined]) => undefined)