fix #9854

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

@@ -408,7 +408,7 @@ export class SearchViewlet extends Viewlet {
 			this.toUnbind.push(renderer);
 
 			this.toUnbind.push(this.tree.addListener2('selection', (event: any) => {
-				let element: Match;
+				let element: any;
 				let keyboard = event.payload && event.payload.origin === 'keyboard';
 				if (keyboard) {
 					element = this.tree.getFocus();
@@ -426,12 +426,15 @@ export class SearchViewlet extends Viewlet {
 				let sideBySide = (originalEvent && (originalEvent.ctrlKey || originalEvent.metaKey));
 				let focusEditor = (keyboard && (<KeyboardEvent>originalEvent).keyCode === KeyCode.Enter) || doubleClick;
 
+				if (element instanceof Match) {
+					let selectedMatch:Match = element;
 					if (this.currentSelectedFileMatch) {
 						this.currentSelectedFileMatch.setSelectedMatch(null);
 					}
-				this.currentSelectedFileMatch = element.parent();
-				this.currentSelectedFileMatch.setSelectedMatch(element);
-				this.onFocus(element, !focusEditor, sideBySide, doubleClick);
+					this.currentSelectedFileMatch = selectedMatch.parent();
+					this.currentSelectedFileMatch.setSelectedMatch(selectedMatch);
+					this.onFocus(selectedMatch, !focusEditor, sideBySide, doubleClick);
+				}
 			}));
 		});
 	}
@@ -902,7 +905,7 @@ export class SearchViewlet extends Viewlet {
 		this.currentSelectedFileMatch = null;
 	}
 
-	private onFocus(lineMatch: Match, preserveFocus?: boolean, sideBySide?: boolean, pinned?: boolean): TPromise<any> {
+	private onFocus(lineMatch: any, preserveFocus?: boolean, sideBySide?: boolean, pinned?: boolean): TPromise<any> {
 		if (!(lineMatch instanceof Match)) {
 			return TPromise.as(true);
 		}