fixes #90478

src/vs/workbench/contrib/debug/browser/debug.contribution.ts

@@ -262,8 +262,8 @@ configurationRegistry.registerConfiguration({
 			default: true
 		},
 		'debug.onTaskErrors': {
-			enum: ['debugAnyway', 'showErrors', 'prompt'],
-			enumDescriptions: [nls.localize('debugAnyway', "Ignore task errors and start debugging."), nls.localize('showErrors', "Show the Problems view and do not start debugging."), nls.localize('prompt', "Prompt user.")],
+			enum: ['debugAnyway', 'showErrors', 'prompt', 'cancel'],
+			enumDescriptions: [nls.localize('debugAnyway', "Ignore task errors and start debugging."), nls.localize('showErrors', "Show the Problems view and do not start debugging."), nls.localize('prompt', "Prompt user."), nls.localize('cancel', "Cancel debugging.")],
 			description: nls.localize('debug.onTaskErrors', "Controls what to do when errors are encountered after running a preLaunchTask."),
 			default: 'prompt'
 		},

src/vs/workbench/contrib/debug/browser/debugTaskRunner.ts

@@ -72,6 +72,9 @@ export class DebugTaskRunner {
 				await this.viewsService.openView(Constants.MARKERS_VIEW_ID);
 				return Promise.resolve(TaskRunResult.Failure);
 			}
+			if (onTaskErrors === 'cancel') {
+				return Promise.resolve(TaskRunResult.Failure);
+			}
 
 			const taskLabel = typeof taskId === 'string' ? taskId : taskId ? taskId.name : '';
 			const message = errorCount > 1
@@ -89,12 +92,15 @@ export class DebugTaskRunner {
 				cancelId: 2
 			});
 
-			if (result.choice === 2) {
-				return Promise.resolve(TaskRunResult.Failure);
-			}
+
 			const debugAnyway = result.choice === 0;
+			const cancel = result.choice = 2;
 			if (result.checkboxChecked) {
-				this.configurationService.updateValue('debug.onTaskErrors', debugAnyway ? 'debugAnyway' : 'showErrors');
+				this.configurationService.updateValue('debug.onTaskErrors', result.choice === 0 ? 'debugAnyway' : cancel ? 'cancel' : 'showErrors');
+			}
+
+			if (cancel) {
+				return Promise.resolve(TaskRunResult.Failure);
 			}
 			if (debugAnyway) {
 				return TaskRunResult.Success;

src/vs/workbench/contrib/debug/common/debug.ts

@@ -467,7 +467,7 @@ export interface IDebugConfiguration {
 		closeOnEnd: boolean;
 	};
 	focusWindowOnBreak: boolean;
-	onTaskErrors: 'debugAnyway' | 'showErrors' | 'prompt';
+	onTaskErrors: 'debugAnyway' | 'showErrors' | 'prompt' | 'cancel';
 	showBreakpointsInOverviewRuler: boolean;
 	showInlineBreakpointCandidates: boolean;
 }