From 066db6b85f4df3029f492da5d1cb8324b4fa7340 Mon Sep 17 00:00:00 2001
From: Matt Bierner <matb@microsoft.com>
Date: Tue, 23 May 2017 15:41:06 -0700
Subject: [PATCH] Fix potential hang when canceling ts requests using pipe.
 Part of #24698

---
 extensions/typescript/src/typescriptServiceClient.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/extensions/typescript/src/typescriptServiceClient.ts b/extensions/typescript/src/typescriptServiceClient.ts
index 4ea7ba42287..f5a92dbd4cd 100644
--- a/extensions/typescript/src/typescriptServiceClient.ts
+++ b/extensions/typescript/src/typescriptServiceClient.ts
@@ -910,6 +910,13 @@ export default class TypeScriptServiceClient implements ITypescriptServiceClient
 				return true;
 			} catch (e) {
 				// noop
+			} finally {
+				const p = this.callbacks[seq];
+				if (p) {
+					delete this.callbacks[seq];
+					this.pendingResponses--;
+					p.e(new Error(`Cancelled Request ${seq}`));
+				}
 			}
 		}