From a9936ddd351299ebbfded7d99237d22c3fb71e8e Mon Sep 17 00:00:00 2001
From: Alex Ross <alros@microsoft.com>
Date: Mon, 13 Jul 2020 14:16:02 +0200
Subject: [PATCH] Improve isMarkdownString check

---
 src/vs/workbench/api/common/extHostTypes.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/vs/workbench/api/common/extHostTypes.ts b/src/vs/workbench/api/common/extHostTypes.ts
index e6a5897675f..2dc58181a4d 100644
--- a/src/vs/workbench/api/common/extHostTypes.ts
+++ b/src/vs/workbench/api/common/extHostTypes.ts
@@ -1276,7 +1276,7 @@ export class MarkdownString {
 		if (thing instanceof MarkdownString) {
 			return true;
 		}
-		return (thing !== undefined) && thing.appendCodeblock && thing.appendMarkdown && thing.appendText && (thing.value !== undefined);
+		return thing && thing.appendCodeblock && thing.appendMarkdown && thing.appendText && (thing.value !== undefined);
 	}
 }
 
-- 
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