debug: log error message for debugMisconfiguration event

#16171

src/vs/workbench/parts/debug/electron-browser/debugService.ts

@@ -732,7 +732,8 @@ export class DebugService implements debug.IDebugService {
 					return TPromise.as(null);
 				}
 
-				this.telemetryService.publicLog('debugMisconfiguration', { type: configuration ? configuration.type : undefined });
+				const errorMessage = error instanceof Error ? error.message : error;
+				this.telemetryService.publicLog('debugMisconfiguration', { type: configuration ? configuration.type : undefined, error: errorMessage });
 				this.setStateAndEmit(session.getId(), debug.State.Inactive);
 				if (!session.disconnected) {
 					session.disconnect().done(null, errors.onUnexpectedError);