fix #54431

src/vs/workbench/api/electron-browser/mainThreadSaveParticipant.ts

@@ -215,16 +215,20 @@ class FormatOnSaveParticipant implements ISaveParticipantParticipant {
 		const timeout = this._configurationService.getValue('editor.formatOnSaveTimeout', { overrideIdentifier: model.getLanguageIdentifier().language, resource: editorModel.getResource() });
 
 		return new Promise<ISingleEditOperation[]>((resolve, reject) => {
-			setTimeout(() => reject(localize('timeout.formatOnSave', "Aborted format on save after {0}ms", timeout)), timeout);
-			getDocumentFormattingEdits(model, { tabSize, insertSpaces })
-				.then(edits => this._editorWorkerService.computeMoreMinimalEdits(model.uri, edits))
-				.then(resolve, err => {
-					if (!(err instanceof Error) || err.name !== NoProviderError.Name) {
-						reject(err);
-					} else {
-						resolve();
-					}
-				});
+			let request = getDocumentFormattingEdits(model, { tabSize, insertSpaces });
+
+			setTimeout(() => {
+				reject(localize('timeout.formatOnSave', "Aborted format on save after {0}ms", timeout));
+				request.cancel();
+			}, timeout);
+
+			request.then(edits => this._editorWorkerService.computeMoreMinimalEdits(model.uri, edits)).then(resolve, err => {
+				if (!(err instanceof Error) || err.name !== NoProviderError.Name) {
+					reject(err);
+				} else {
+					resolve();
+				}
+			});
 
 		}).then(edits => {
 			if (!isFalsyOrEmpty(edits) && versionNow === model.getVersionId()) {