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src/vs/workbench/parts/search/browser/openFileHandler.ts

@@ -139,7 +139,7 @@ export class OpenFileHandler extends QuickOpenHandler {
 		this.options = options;
 	}
 
-	getResults(searchValue: string, maxSortedResults?: number, token?: CancellationToken): TPromise<FileQuickOpenModel> {
+	getResults(searchValue: string, maxSortedResults?: number, token: CancellationToken = CancellationToken.None): TPromise<FileQuickOpenModel> {
 		const query = prepareQuery(searchValue);
 
 		// Respond directly to empty search

src/vs/workbench/parts/search/browser/openSymbolHandler.ts

@@ -150,12 +150,18 @@ export class OpenSymbolHandler extends QuickOpenHandler {
 		return true;
 	}
 
-	public getResults(searchValue: string, token?: CancellationToken): TPromise<QuickOpenModel> {
+	public getResults(searchValue: string, token: CancellationToken = CancellationToken.None): TPromise<QuickOpenModel> {
 		searchValue = searchValue.trim();
 
 		let promise: TPromise<QuickOpenEntry[]>;
 		if (!this.options.skipDelay) {
-			promise = this.delayer.trigger(() => this.doGetResults(searchValue, token)); // Run search with delay as needed
+			promise = this.delayer.trigger(() => {
+				if (token.isCancellationRequested) {
+					return TPromise.wrap([]);
+				}
+
+				return this.doGetResults(searchValue, token);
+			});
 		} else {
 			promise = this.doGetResults(searchValue, token);
 		}