Strict null check contextScopedHistoryWidget

src/tsconfig.strictNullChecks.json

@@ -529,6 +529,7 @@
 		"./vs/platform/url/common/urlService.ts",
 		"./vs/platform/url/electron-main/electronUrlListener.ts",
 		"./vs/platform/url/node/urlIpc.ts",
+		"./vs/platform/widget/browser/contextScopedHistoryWidget.ts",
 		"./vs/platform/widget/common/contextScopedWidget.ts",
 		"./vs/platform/windows/common/windows.ts",
 		"./vs/platform/windows/electron-browser/windowService.ts",

src/vs/platform/widget/browser/contextScopedHistoryWidget.ts

@@ -57,8 +57,11 @@ KeybindingsRegistry.registerCommandAndKeybindingRule({
 	primary: KeyCode.UpArrow,
 	secondary: [KeyMod.Alt | KeyCode.UpArrow],
 	handler: (accessor, arg2) => {
-		const historyInputBox: IHistoryNavigationWidget = getContextScopedWidget<IContextScopedHistoryNavigationWidget>(accessor.get(IContextKeyService), HistoryNavigationWidgetContext).historyNavigator;
-		historyInputBox.showPreviousValue();
+		const widget = getContextScopedWidget<IContextScopedHistoryNavigationWidget>(accessor.get(IContextKeyService), HistoryNavigationWidgetContext);
+		if (widget) {
+			const historyInputBox: IHistoryNavigationWidget = widget.historyNavigator;
+			historyInputBox.showPreviousValue();
+		}
 	}
 });
 
@@ -69,7 +72,10 @@ KeybindingsRegistry.registerCommandAndKeybindingRule({
 	primary: KeyCode.DownArrow,
 	secondary: [KeyMod.Alt | KeyCode.DownArrow],
 	handler: (accessor, arg2) => {
-		const historyInputBox: IHistoryNavigationWidget = getContextScopedWidget<IContextScopedHistoryNavigationWidget>(accessor.get(IContextKeyService), HistoryNavigationWidgetContext).historyNavigator;
-		historyInputBox.showNextValue();
+		const widget = getContextScopedWidget<IContextScopedHistoryNavigationWidget>(accessor.get(IContextKeyService), HistoryNavigationWidgetContext);
+		if (widget) {
+			const historyInputBox: IHistoryNavigationWidget = widget.historyNavigator;
+			historyInputBox.showNextValue();
+		}
 	}
 });