Bug: Intermittent browser/components/urlbar/tests/browser/browser_blanking.js | single tracking bug
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2022-08-26 07:22:36+00:00
Resolved: 2022-09-20 17:04:15+00:00

**Filed by:** ctuns [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=388552959&repo=mozilla-central
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/ZD5kScwfR_eiy2G3fWa4pQ/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2022-08-26T06:19:07.713Z] 06:19:07     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_blanking.js | The URL bar should be empty if we load a plain about:blank page. - 
[task 2022-08-26T06:19:07.714Z] 06:19:07     INFO - Buffered messages finished
[task 2022-08-26T06:19:07.715Z] 06:19:07     INFO - TEST-UNEXPECTED-FAIL | browser/components/urlbar/tests/browser/browser_blanking.js | Test timed out - 
[task 2022-08-26T06:19:07.715Z] 06:19:07     INFO - GECKO(5888) | MEMORY STAT | vsize 1244MB | vsizeMaxContiguous 121MB | residentFast 373MB | heapAllocated 289MB
[task 2022-08-26T06:19:07.716Z] 06:19:07     INFO - TEST-OK | browser/components/urlbar/tests/browser/browser_blanking.js | took 45067ms
[task 2022-08-26T06:19:07.716Z] 06:19:07     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-26T06:19:07.717Z] 06:19:07     INFO - TEST-UNEXPECTED-FAIL | browser/components/urlbar/tests/browser/browser_blanking.js | Found a tab after previous test timed out: about:home - 
[task 2022-08-26T06:19:07.718Z] 06:19:07     INFO - checking window state
[task 2022-08-26T06:19:07.718Z] 06:19:07     INFO - TEST-START | browser/components/urlbar/tests/browser/browser_calculator.js
[task 2022-08-26T06:19:07.727Z] 06:19:07     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-26T06:19:07.728Z] 06:19:07     INFO - Buffered messages logged at 06:19:07
[task 2022-08-26T06:19:07.729Z] 06:19:07     INFO - Entering test bound init
[task 2022-08-26T06:19:07.729Z] 06:19:07     INFO - Buffered messages finished
[task 2022-08-26T06:19:07.730Z] 06:19:07     INFO - TEST-UNEXPECTED-FAIL | browser/components/urlbar/tests/browser/browser_blanking.js | Uncaught exception received from previously timed out test - at chrome://mochitests/content/browser/browser/components/urlbar/tests/browser/browser_blanking.js:15 - ReferenceError: ok is not defined
[task 2022-08-26T06:19:07.730Z] 06:19:07     INFO - Stack trace:
[task 2022-08-26T06:19:07.730Z] 06:19:07     INFO - @chrome://mochitests/content/browser/browser/components/urlbar/tests/browser/browser_blanking.js:15:5
[task 2022-08-26T06:19:07.731Z] 06:19:07     INFO - Leaving test bound init
[task 2022-08-26T06:19:07.732Z] 06:19:07     INFO - Entering test bound test_calculator
[task 2022-08-26T06:19:07.733Z] 06:19:07     INFO - Awaiting for the urlbar panel to open
[task 2022-08-26T06:19:07.739Z] 06:19:07     INFO - GECKO(5888) | JavaScript error: chrome://mochikit/content/browser-test.js, line 1091: TypeError: can't access property "shift", currentScope.__tasks is null
[task 2022-08-26T06:19:07.741Z] 06:19:07     INFO - Console message: [JavaScript Error: "TypeError: can't access property "shift", currentScope.__tasks is null" {file: "chrome://mochikit/content/browser-test.js" line: 1091}]
[task 2022-08-26T06:19:07.795Z] 06:19:07     INFO - Urlbar panel opened
[task 2022-08-26T06:19:07.830Z] 06:19:07     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_calculator.js | 8 == 8 - 
[task 2022-08-26T06:19:07.831Z] 06:19:07     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_calculator.js | "8 * 8" == "8 * 8" - 
[task 2022-08-26T06:19:07.832Z] 06:19:07     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_calculator.js | 64 == "64" - 
[task 2022-08-26T06:19:07.832Z] 06:19:07     INFO - Initializing clipboard with "waitForClipboard-known-value-0.7075521479209745"...
[task 2022-08-26T06:19:07.833Z] 06:19:07     INFO - Succeeded initializing clipboard, start requested things...
[task 2022-08-26T06:19:07.837Z] 06:19:07     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_calculator.js | Clipboard has the given value: '64' - 
[task 2022-08-26T06:19:07.839Z] 06:19:07     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-26T06:19:07.841Z] 06:19:07     INFO - TEST-UNEXPECTED-FAIL | browser/components/urlbar/tests/browser/browser_calculator.js | A promise chain failed to handle a rejection: can't access property "shift", currentScope.__tasks is null - stack: _runTaskBasedTest@chrome://mochikit/content/browser-test.js:1091:13
[task 2022-08-26T06:19:07.841Z] 06:19:07     INFO - Rejection date: Fri Aug 26 2022 06:19:07 GMT+0000 (Coordinated Universal Time) - false == true - JS frame :: resource://testing-common/PromiseTestUtils.jsm :: assertNoUncaughtRejections :: line 270
[task 2022-08-26T06:19:07.841Z] 06:19:07     INFO - Stack trace:
[task 2022-08-26T06:19:07.841Z] 06:19:07     INFO - resource://testing-common/PromiseTestUtils.jsm:assertNoUncaughtRejections:270
[task 2022-08-26T06:19:07.841Z] 06:19:07     INFO - chrome://mochikit/content/browser-test.js:handleTask:1056
[task 2022-08-26T06:19:07.842Z] 06:19:07     INFO - Leaving test bound test_calculator
[task 2022-08-26T06:19:08.163Z] 06:19:08     INFO - GECKO(5888) | MEMORY STAT | vsize 1238MB | vsizeMaxContiguous 121MB | residentFast 371MB | heapAllocated 285MB
[task 2022-08-26T06:19:08.164Z] 06:19:08     INFO - TEST-OK | browser/components/urlbar/tests/browser/browser_calculator.js | took 447ms
[task 2022-08-26T06:19:08.176Z] 06:19:08     INFO - checking window state
[task 2022-08-26T06:19:08.188Z] 06:19:08     INFO - TEST-START | browser/components/urlbar/tests/browser/browser_canonizeURL.js
```