test: capture stack trace in debugger timeout errors

joyeecheung · aduh95 · commit e8d759805749 · 2025-11-13T22:44:15.000+01:00
Otherwise when the expected prompt does not show up in the session and the debugger tests time out, there is not enough information to figure out exactly which line in the test is causing the timeout. PR-URL: #60457 Reviewed-By: Ethan Arrowood <ethan@arrowood.dev> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
diff --git a/test/common/debugger.js b/test/common/debugger.js
@@ -88,12 +88,12 @@ function startCLI(args, flags = [], spawnOpts = {}, opts = { randomPort: true })
           reject(new Error(message));
         }
 
+        // Capture stack trace here to show where waitFor was called from when it times out.
+        const timeoutErr = new Error(`Timeout (${TIMEOUT}) while waiting for ${pattern}`);
         const timer = setTimeout(() => {
           tearDown();
-          reject(new Error([
-            `Timeout (${TIMEOUT}) while waiting for ${pattern}`,
-            `found: ${this.output}`,
-          ].join('; ')));
+          timeoutErr.output = this.output;
+          reject(timeoutErr);
         }, TIMEOUT);
 
         function tearDown() {
