From d574f3d94cb818f9e1e63a5967c32acafc02c2ec Mon Sep 17 00:00:00 2001
From: Koen Vlaswinkel <koesie10@github.com>
Date: Thu, 2 Mar 2023 12:32:45 +0100
Subject: [PATCH] Fix error while deleting query history item

When deleting a query history item and the "next" query is still
running, the `completedQuery` is `undefined`. This commit fixes it by
using optional chaining to ensure that the `completedQuery` is defined
before accessing its `successful` property.
---
 extensions/ql-vscode/src/interface.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/extensions/ql-vscode/src/interface.ts b/extensions/ql-vscode/src/interface.ts
index a3389fdfa63..17655fa7c7c 100644
--- a/extensions/ql-vscode/src/interface.ts
+++ b/extensions/ql-vscode/src/interface.ts
@@ -399,7 +399,7 @@ export class ResultsView extends AbstractWebview<
     forceReveal: WebviewReveal,
     shouldKeepOldResultsWhileRendering = false,
   ): Promise<void> {
-    if (!fullQuery.completedQuery.successful) {
+    if (!fullQuery.completedQuery?.successful) {
       return;
     }