Bug: Intermittent [tier 2] browser/components/sessionstore/test/browser_tab_groups_saved.js | single tracking bug
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2025-02-04 22:28:14+00:00
Resolved: 2025-03-03 12:02:12+00:00

**Filed by:** agoloman [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=493305295&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Gvc7XNDkR_yhPgmCezCTkQ/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2025-02-04T22:12:03.846Z] 22:12:03     INFO - TEST-PASS | browser/components/sessionstore/test/browser_tab_groups_saved.js | group2 still has 1 tab - 1 == 1 - 
[task 2025-02-04T22:12:03.846Z] 22:12:03     INFO - Console message: [JavaScript Error: "Cannot attach ID to a tab in a closed window." {file: "chrome://browser/content/parent/ext-browser.js" line: 343}]
[task 2025-02-04T22:12:03.846Z] 22:12:03     INFO - setId@chrome://browser/content/parent/ext-browser.js:343:13
[task 2025-02-04T22:12:03.846Z] 22:12:03     INFO - getId@chrome://browser/content/parent/ext-browser.js:319:10
[task 2025-02-04T22:12:03.846Z] 22:12:03     INFO - emitRemoved@chrome://browser/content/parent/ext-browser.js:683:22
[task 2025-02-04T22:12:03.846Z] 22:12:03     INFO - _handleWindowClose@chrome://browser/content/parent/ext-browser.js:610:14
[task 2025-02-04T22:12:03.846Z] 22:12:03     INFO - observe@chrome://extensions/content/parent/ext-tabs-base.js:1761:19
[task 2025-02-04T22:12:03.846Z] 22:12:03     INFO - 
[task 2025-02-04T22:12:03.846Z] 22:12:03     INFO - Console message: [JavaScript Error: "NS_ERROR_FAILURE: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIWebProgress.removeProgressListener]" {file: "chrome://browser/content/tabbrowser/tabbrowser.js" line: 6647}]
[task 2025-02-04T22:12:03.846Z] 22:12:03     INFO - destroy@chrome://browser/content/tabbrowser/tabbrowser.js:6647:31
[task 2025-02-04T22:12:03.846Z] 22:12:03     INFO - onUnload@chrome://browser/content/browser-init.js:1143:14
[task 2025-02-04T22:12:03.846Z] 22:12:03     INFO - EventHandlerNonNull*@chrome://browser/content/browser.xhtml:134:43
[task 2025-02-04T22:12:03.846Z] 22:12:03     INFO - 
[task 2025-02-04T22:12:03.847Z] 22:12:03     INFO - Console message: [JavaScript Warning: "Loading failed for the module with source “chrome://global/content/vendor/lit.all.mjs”." {file: "about:newtab" line: 0}]
[task 2025-02-04T22:12:03.847Z] 22:12:03     INFO - Console message: [JavaScript Warning: "Loading failed for the module with source “chrome://global/content/lit-utils.mjs”." {file: "about:newtab" line: 0}]
[task 2025-02-04T22:12:03.847Z] 22:12:03     INFO - Console message: [JavaScript Warning: "Loading failed for the module with source “chrome://global/content/elements/moz-label.mjs”." {file: "about:newtab" line: 0}]
[task 2025-02-04T22:12:03.847Z] 22:12:03     INFO - Leaving test bound test_SaveTabGroups
[task 2025-02-04T22:12:03.847Z] 22:12:03     INFO - Entering test bound test_ignoreUnimportantTabGroups
[task 2025-02-04T22:12:03.847Z] 22:12:03     INFO - Buffered messages finished
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_tab_groups_saved.js | savedGroups starts empty - 1 == 0 - 
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - Stack trace:
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - chrome://mochitests/content/browser/browser/components/sessionstore/test/browser_tab_groups_saved.js:test_ignoreUnimportantTabGroups:59
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - chrome://mochikit/content/browser-test.js:handleTask:1147
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - chrome://mochikit/content/browser-test.js:_runTaskBasedTest:1219
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1360
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - chrome://mochikit/content/browser-test.js:nextTest/<:1136
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/<:1058
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - Not taking screenshot here: see the one that was previously logged
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_tab_groups_saved.js | savedGroups is still empty - 1 == 0 - 
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - Stack trace:
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - chrome://mochitests/content/browser/browser/components/sessionstore/test/browser_tab_groups_saved.js:test_ignoreUnimportantTabGroups:68
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - chrome://mochikit/content/browser-test.js:handleTask:1147
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - chrome://mochikit/content/browser-test.js:_runTaskBasedTest:1219
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1360
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - chrome://mochikit/content/browser-test.js:nextTest/<:1136
[task 2025-02-04T22:12:03.848Z] 22:12:03     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/<:1058
[task 2025-02-04T22:12:03.856Z] 22:12:03     INFO - Leaving test bound test_ignoreUnimportantTabGroups
[task 2025-02-04T22:12:03.878Z] 22:12:03     INFO - running 
[task 2025-02-04T22:12:04.471Z] 22:12:04     INFO - GECKO(3666) | MEMORY STAT | vsize 427793MB | residentFast 881MB | heapAllocated 425MB
[task 2025-02-04T22:12:04.471Z] 22:12:04     INFO - TEST-OK | browser/components/sessionstore/test/browser_tab_groups_saved.js | took 1026ms
```