fix: display error when project is not found

packages/playwright/src/worker/workerMain.ts

@@ -50,6 +50,8 @@ export class WorkerMain extends ProcessRunner {
   private _didRunFullCleanup = false;
   // Whether the worker was requested to stop.
   private _isStopped = false;
+  // Whether a fatal error was caused by a missing project.
+  private _isMissingProject = false;
   // This promise resolves once the single "run test group" call finishes.
   private _runFinished = new ManualPromise<void>();
   private _currentTest: TestInfoImpl | null = null;
@@ -105,6 +107,10 @@ export class WorkerMain extends ProcessRunner {
   override async gracefullyClose() {
     try {
       await this._stop();
+      if (this._isMissingProject) {
+        // We never set anything up and we can crash on attempting cleanup
+        return;
+      }
       // Ignore top-level errors, they are already inside TestInfo.errors.
       const fakeTestInfo = new TestInfoImpl(this._config, this._project, this._params, undefined, 0, () => {}, () => {}, () => {});
       const runnable = { type: 'teardown' } as const;
@@ -191,14 +197,19 @@ export class WorkerMain extends ProcessRunner {
       return;
 
     this._config = await deserializeConfig(this._params.config);
-    this._project = this._config.projects.find(p => p.id === this._params.projectId)!;
+    const project = this._config.projects.find(p => p.id === this._params.projectId);
+    if (!project) {
+      this._isMissingProject = true;
+      throw new Error(`Project with name "${this._params.projectId}" not found. Make sure project name does not change`);
+    }
+    this._project = project;
     this._poolBuilder = PoolBuilder.createForWorker(this._project);
   }
 
   async runTestGroup(runPayload: RunPayload) {
     this._runFinished = new ManualPromise<void>();
     const entries = new Map(runPayload.entries.map(e => [e.testId, e]));
-    let fatalUnknownTestIds;
+    let fatalUnknownTestIds: string[] | undefined;
     try {
       await this._loadIfNeeded();
       const fileSuite = await loadTestFile(runPayload.file, this._config.config.rootDir);