Bug: Intermittent browser/base/content/test/tabs/browser_multiselect_tabs_bookmark.js | single tracking bug
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2022-08-18 23:52:14+00:00
Resolved: 2023-06-30 12:00:44+00:00

**Filed by:** ctuns [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=387795799&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/bOuAl-gJT0iEEzFXBc1HpQ/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2022-08-18T22:28:14.588Z] 22:28:14     INFO - TEST-PASS | browser/base/content/test/tabs/browser_multiselect_tabs_bookmark.js | Zero multiselected tabs - 
[task 2022-08-18T22:28:14.588Z] 22:28:14     INFO - Buffered messages finished
[task 2022-08-18T22:28:14.588Z] 22:28:14     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_bookmark.js | Test timed out - 
[task 2022-08-18T22:28:14.588Z] 22:28:14     INFO - GECKO(1626) | MEMORY STAT | vsize 3988MB | residentFast 551MB | heapAllocated 284MB
[task 2022-08-18T22:28:14.588Z] 22:28:14     INFO - TEST-OK | browser/base/content/test/tabs/browser_multiselect_tabs_bookmark.js | took 45024ms
[task 2022-08-18T22:28:14.590Z] 22:28:14     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:28:14.591Z] 22:28:14     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_bookmark.js | Found a tab after previous test timed out: http://mochi.test:8888/ - 
[task 2022-08-18T22:28:14.591Z] 22:28:14     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:28:14.592Z] 22:28:14     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_bookmark.js | Found a tab after previous test timed out: http://mochi.test:8888/ - 
[task 2022-08-18T22:28:14.593Z] 22:28:14     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:28:14.594Z] 22:28:14     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_bookmark.js | Found a tab after previous test timed out: http://mochi.test:8888/ - 
[task 2022-08-18T22:28:14.594Z] 22:28:14     INFO - checking window state
[task 2022-08-18T22:28:14.596Z] 22:28:14     INFO - TEST-START | browser/base/content/test/tabs/browser_multiselect_tabs_clear_selection_when_tab_switch.js
[task 2022-08-18T22:28:14.955Z] 22:28:14     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:28:14.955Z] 22:28:14     INFO - Buffered messages logged at 22:28:14
[task 2022-08-18T22:28:14.956Z] 22:28:14     INFO - Entering test bound test
[task 2022-08-18T22:28:14.957Z] 22:28:14     INFO - Console message: [JavaScript Warning: "This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “<!DOCTYPE html>”." {file: "http://mochi.test:8888/" line: 0}]
[task 2022-08-18T22:28:14.957Z] 22:28:14     INFO - Console message: [JavaScript Warning: "This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “<!DOCTYPE html>”." {file: "http://mochi.test:8888/" line: 0}]
[task 2022-08-18T22:28:14.958Z] 22:28:14     INFO - Console message: [JavaScript Warning: "This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “<!DOCTYPE html>”." {file: "http://mochi.test:8888/" line: 0}]
[task 2022-08-18T22:28:14.959Z] 22:28:14     INFO - TEST-PASS | browser/base/content/test/tabs/browser_multiselect_tabs_clear_selection_when_tab_switch.js | Zero multiselected tabs - 
[task 2022-08-18T22:28:14.959Z] 22:28:14     INFO - Buffered messages finished
[task 2022-08-18T22:28:14.960Z] 22:28:14     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_bookmark.js | Uncaught exception received from previously timed out test - at chrome://mochitests/content/browser/browser/base/content/test/tabs/head.js:18 - TypeError: can't access property "waitForEvent", BrowserTestUtils is null
[task 2022-08-18T22:28:14.961Z] 22:28:14     INFO - Stack trace:
[task 2022-08-18T22:28:14.961Z] 22:28:14     INFO - triggerClickOn@chrome://mochitests/content/browser/browser/base/content/test/tabs/head.js:18:17
[task 2022-08-18T22:28:14.961Z] 22:28:14     INFO - test@chrome://mochitests/content/browser/browser/base/content/test/tabs/browser_multiselect_tabs_bookmark.js:27:9
[task 2022-08-18T22:28:14.964Z] 22:28:14     INFO - TEST-PASS | browser/base/content/test/tabs/browser_multiselect_tabs_clear_selection_when_tab_switch.js | Four multiselected tabs - 
[task 2022-08-18T22:28:14.964Z] 22:28:14     INFO - TEST-PASS | browser/base/content/test/tabs/browser_multiselect_tabs_clear_selection_when_tab_switch.js | InitialTab is the active tab - 
[task 2022-08-18T22:28:14.965Z] 22:28:14     INFO - Un-select the active tab
[task 2022-08-18T22:28:14.974Z] 22:28:14     INFO - GECKO(1626) | JavaScript error: chrome://mochikit/content/browser-test.js, line 1091: TypeError: can't access property "shift", currentScope.__tasks is null
[task 2022-08-18T22:28:14.979Z] 22:28:14     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 2022-08-18T22:28:59.438Z] 22:28:59     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:28:59.438Z] 22:28:59     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_clear_selection_when_tab_switch.js | Test timed out - 
[task 2022-08-18T22:28:59.439Z] 22:28:59     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:28:59.441Z] 22:28:59     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_clear_selection_when_tab_switch.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 2022-08-18T22:28:59.441Z] 22:28:59     INFO - Rejection date: Thu Aug 18 2022 22:28:14 GMT+0000 (Coordinated Universal Time) - false == true - JS frame :: resource://testing-common/PromiseTestUtils.jsm :: assertNoUncaughtRejections :: line 270
[task 2022-08-18T22:28:59.442Z] 22:28:59     INFO - Stack trace:
[task 2022-08-18T22:28:59.442Z] 22:28:59     INFO - resource://testing-common/PromiseTestUtils.jsm:assertNoUncaughtRejections:270
[task 2022-08-18T22:28:59.442Z] 22:28:59     INFO - chrome://mochikit/content/browser-test.js:nextTest:663
[task 2022-08-18T22:28:59.442Z] 22:28:59     INFO - chrome://mochikit/content/browser-test.js:timeoutFn:1328
[task 2022-08-18T22:28:59.443Z] 22:28:59     INFO - GECKO(1626) | MEMORY STAT | vsize 3988MB | residentFast 551MB | heapAllocated 284MB
[task 2022-08-18T22:28:59.444Z] 22:28:59     INFO - TEST-OK | browser/base/content/test/tabs/browser_multiselect_tabs_clear_selection_when_tab_switch.js | took 45045ms
[task 2022-08-18T22:28:59.445Z] 22:28:59     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:28:59.445Z] 22:28:59     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_clear_selection_when_tab_switch.js | Found a tab after previous test timed out: http://mochi.test:8888/ - 
[task 2022-08-18T22:28:59.459Z] 22:28:59     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:28:59.460Z] 22:28:59     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_clear_selection_when_tab_switch.js | Found a tab after previous test timed out: http://mochi.test:8888/ - 
[task 2022-08-18T22:28:59.465Z] 22:28:59     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:28:59.466Z] 22:28:59     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_clear_selection_when_tab_switch.js | Found a tab after previous test timed out: http://mochi.test:8888/ - 
[task 2022-08-18T22:28:59.487Z] 22:28:59     INFO - checking window state
[task 2022-08-18T22:28:59.513Z] 22:28:59     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:28:59.515Z] 22:28:59     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_clear_selection_when_tab_switch.js | Uncaught exception received from previously timed out test - at chrome://mochitests/content/browser/browser/base/content/test/tabs/browser_multiselect_tabs_clear_selection_when_tab_switch.js:22 - ReferenceError: is is not defined
[task 2022-08-18T22:28:59.515Z] 22:28:59     INFO - Stack trace:
[task 2022-08-18T22:28:59.515Z] 22:28:59     INFO - test@chrome://mochitests/content/browser/browser/base/content/test/tabs/browser_multiselect_tabs_clear_selection_when_tab_switch.js:22:3
[task 2022-08-18T22:28:59.518Z] 22:28:59     INFO - TEST-START | browser/base/content/test/tabs/browser_multiselect_tabs_close.js
[task 2022-08-18T22:28:59.541Z] 22:28:59     INFO - GECKO(1626) | JavaScript error: chrome://mochikit/content/browser-test.js, line 1091: TypeError: can't access property "shift", currentScope.__tasks is null
[task 2022-08-18T22:28:59.551Z] 22:28:59     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:28:59.552Z] 22:28:59     INFO - Buffered messages logged at 22:28:59
[task 2022-08-18T22:28:59.555Z] 22:28:59     INFO - Entering test bound setPref
[task 2022-08-18T22:28:59.555Z] 22:28:59     INFO - Buffered messages finished
[task 2022-08-18T22:28:59.555Z] 22:28:59     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_close.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 2022-08-18T22:28:59.556Z] 22:28:59     INFO - Rejection date: Thu Aug 18 2022 22:28:59 GMT+0000 (Coordinated Universal Time) - false == true - JS frame :: resource://testing-common/PromiseTestUtils.jsm :: assertNoUncaughtRejections :: line 270
[task 2022-08-18T22:28:59.557Z] 22:28:59     INFO - Stack trace:
[task 2022-08-18T22:28:59.557Z] 22:28:59     INFO - resource://testing-common/PromiseTestUtils.jsm:assertNoUncaughtRejections:270
[task 2022-08-18T22:28:59.557Z] 22:28:59     INFO - chrome://mochikit/content/browser-test.js:handleTask:1056
[task 2022-08-18T22:28:59.558Z] 22:28:59     INFO - Leaving test bound setPref
[task 2022-08-18T22:28:59.558Z] 22:28:59     INFO - Entering test bound usingTabCloseButton
[task 2022-08-18T22:28:59.575Z] 22:28:59     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 2022-08-18T22:28:59.609Z] 22:28:59     INFO - Console message: [JavaScript Warning: "This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “<!DOCTYPE html>”." {file: "http://mochi.test:8888/" line: 0}]
[task 2022-08-18T22:28:59.681Z] 22:28:59     INFO - Console message: [JavaScript Warning: "This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “<!DOCTYPE html>”." {file: "http://mochi.test:8888/" line: 0}]
[task 2022-08-18T22:28:59.995Z] 22:28:59     INFO - Console message: [JavaScript Warning: "This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “<!DOCTYPE html>”." {file: "http://mochi.test:8888/" line: 0}]
[task 2022-08-18T22:29:00.396Z] 22:29:00     INFO - Console message: [JavaScript Warning: "This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “<!DOCTYPE html>”." {file: "http://mochi.test:8888/" line: 0}]
[task 2022-08-18T22:29:00.705Z] 22:29:00     INFO - TEST-PASS | browser/base/content/test/tabs/browser_multiselect_tabs_close.js | Zero multiselected tabs - 
[task 2022-08-18T22:29:44.524Z] 22:29:44     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:29:44.526Z] 22:29:44     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_close.js | Test timed out - 
[task 2022-08-18T22:29:44.528Z] 22:29:44     INFO - GECKO(1626) | MEMORY STAT | vsize 3988MB | residentFast 551MB | heapAllocated 284MB
[task 2022-08-18T22:29:44.529Z] 22:29:44     INFO - TEST-OK | browser/base/content/test/tabs/browser_multiselect_tabs_close.js | took 45010ms
[task 2022-08-18T22:29:44.530Z] 22:29:44     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:29:44.531Z] 22:29:44     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_close.js | Found a tab after previous test timed out: http://mochi.test:8888/ - 
[task 2022-08-18T22:29:44.534Z] 22:29:44     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:29:44.535Z] 22:29:44     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_close.js | Found a tab after previous test timed out: http://mochi.test:8888/ - 
[task 2022-08-18T22:29:44.539Z] 22:29:44     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:29:44.539Z] 22:29:44     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_close.js | Found a tab after previous test timed out: http://mochi.test:8888/ - 
[task 2022-08-18T22:29:44.543Z] 22:29:44     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-08-18T22:29:44.544Z] 22:29:44     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_close.js | Found a tab after previous test timed out: http://mochi.test:8888/ - 
[task 2022-08-18T22:29:44.569Z] 22:29:44     INFO - checking window state
[task 2022-08-18T22:29:44.590Z] 22:29:44     INFO - TEST-START | browser/base/content/test/tabs/browser_multiselect_tabs_close_other_tabs.js
```