Bug: Intermittent browser/components/messagepreview/tests/browser/browser_messagepreview_show_featurecallout.js | single tracking bug
Status: NEW
Priority: P1
Created: 2025-02-06 11:04:04+00:00
Resolved: 2025-03-03 06:34:31+00:00

**Filed by:** agoloman [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=493593981&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/KVhMFa4cQkK4-XbkgWsMeA/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2025-02-06T10:40:10.924Z] 10:40:10     INFO - TEST-START | browser/components/messagepreview/tests/browser/browser_messagepreview_show_featurecallout.js
[task 2025-02-06T10:40:12.373Z] 10:40:12     INFO - GECKO(2035) | 1738838412372	Marionette	TRACE	Received observer notification browser-delayed-startup-finished
[task 2025-02-06T10:40:13.104Z] 10:40:13     INFO - TEST-INFO | started process screentopng
[task 2025-02-06T10:40:13.450Z] 10:40:13     INFO - TEST-INFO | screentopng: exit 0
[task 2025-02-06T10:40:13.450Z] 10:40:13     INFO - Buffered messages logged at 10:40:10
[task 2025-02-06T10:40:13.451Z] 10:40:13     INFO - Entering test bound test_show_happy_feature_callout_message
[task 2025-02-06T10:40:13.451Z] 10:40:13     INFO - Buffered messages finished
[task 2025-02-06T10:40:13.451Z] 10:40:13     INFO - TEST-UNEXPECTED-FAIL | browser/components/messagepreview/tests/browser/browser_messagepreview_show_featurecallout.js | Uncaught exception in test bound test_show_happy_feature_callout_message - NotSupportedError: WindowGlobalParent.getActor: Window protocol 'AboutMessagePreview' doesn't match uri about:blank
[task 2025-02-06T10:40:13.451Z] 10:40:13     INFO - Stack trace:
[task 2025-02-06T10:40:13.451Z] 10:40:13     INFO - getAboutMessagePreviewParent@chrome://mochitests/content/browser/browser/components/messagepreview/tests/browser/head.js:11:29
[task 2025-02-06T10:40:13.451Z] 10:40:13     INFO - test_show_happy_feature_callout_message@chrome://mochitests/content/browser/browser/components/messagepreview/tests/browser/browser_messagepreview_show_featurecallout.js:292:40
[task 2025-02-06T10:40:13.451Z] 10:40:13     INFO - async*handleTask@chrome://mochikit/content/browser-test.js:1147:26
[task 2025-02-06T10:40:13.451Z] 10:40:13     INFO - _runTaskBasedTest@chrome://mochikit/content/browser-test.js:1219:18
[task 2025-02-06T10:40:13.451Z] 10:40:13     INFO - Tester_execTest@chrome://mochikit/content/browser-test.js:1360:14
[task 2025-02-06T10:40:13.451Z] 10:40:13     INFO - nextTest/<@chrome://mochikit/content/browser-test.js:1136:14
[task 2025-02-06T10:40:13.452Z] 10:40:13     INFO - SimpleTest.waitForFocus/<@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:1058:13
[task 2025-02-06T10:40:13.452Z] 10:40:13     INFO - Leaving test bound test_show_happy_feature_callout_message
[task 2025-02-06T10:40:13.452Z] 10:40:13     INFO - Entering test bound test_show_feature_callout_without_trigger
[task 2025-02-06T10:40:13.452Z] 10:40:13     INFO - GECKO(2035) | console.log: "Received page event DOMDocElementInserted"
[task 2025-02-06T10:40:14.856Z] 10:40:14     INFO - GECKO(2035) | 1738838414855	Marionette	TRACE	Received observer notification browser-delayed-startup-finished
[task 2025-02-06T10:40:15.654Z] 10:40:15     INFO - GECKO(2035) | console.log: "Received page event DOMDocElementInserted"
[task 2025-02-06T10:40:16.287Z] 10:40:16     INFO - TEST-PASS | browser/components/messagepreview/tests/browser/browser_messagepreview_show_featurecallout.js | showMessage was called - 1 >= 1 - 
[task 2025-02-06T10:40:17.273Z] 10:40:17     INFO - TEST-PASS | browser/components/messagepreview/tests/browser/browser_messagepreview_show_featurecallout.js | Element present with selector main.FEATURE_CALLOUT_1 - [object HTMLElement] == true -
<...>
[task 2025-02-06T10:40:24.618Z] 10:40:24     INFO - TEST-OK | browser/components/messagepreview/tests/browser/browser_messagepreview_show_featurecallout.js | took 13694ms
[task 2025-02-06T10:40:24.742Z] 10:40:24     INFO - checking window state
[task 2025-02-06T10:40:24.744Z] 10:40:24     INFO - Not taking screenshot here: see the one that was previously logged
[task 2025-02-06T10:40:24.745Z] 10:40:24     INFO - TEST-UNEXPECTED-FAIL | browser/components/messagepreview/tests/browser/browser_messagepreview_show_featurecallout.js | Found an unexpected browser window at the end of test run - 
[task 2025-02-06T10:40:24.746Z] 10:40:24     INFO - GECKO(2035) | must wait for focus
[task 2025-02-06T10:40:25.193Z] 10:40:25     INFO - TEST-START | browser/components/messagepreview/tests/browser/browser_messagepreview_show_infobar.js
```