Bug: Intermittent browser/components/preferences/tests/browser_warning_permanent_private_browsing.js | Uncaught exception received from previously timed out test - sync-pane-loaded observer not removed before the end of test
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2021-08-10 01:20:22+00:00
Resolved: 2021-09-07 17:02:19+00:00

**Filed by:** csabou [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=347913158&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/GrDBe4n2So2sUa06kU95GA/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2021-08-10T00:36:12.280Z] 00:36:12     INFO - TEST-PASS | browser/components/preferences/tests/browser_warning_permanent_private_browsing.js | Expect custom history mode - 
[task 2021-08-10T00:36:12.281Z] 00:36:12     INFO - TEST-PASS | browser/components/preferences/tests/browser_warning_permanent_private_browsing.js | Expect a prompt when turning permanent private browsing on! - 
[task 2021-08-10T00:36:12.281Z] 00:36:12     INFO - Leaving test bound 
[task 2021-08-10T00:36:12.282Z] 00:36:12     INFO - Entering test bound 
[task 2021-08-10T00:36:12.282Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2021-08-10T00:36:12.283Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: 2153578497"]
[task 2021-08-10T00:36:12.284Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2021-08-10T00:36:12.284Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2021-08-10T00:36:12.285Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2021-08-10T00:36:12.286Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2021-08-10T00:36:12.286Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2021-08-10T00:36:12.287Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2021-08-10T00:36:12.288Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2021-08-10T00:36:12.288Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2021-08-10T00:36:12.289Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2021-08-10T00:36:12.290Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2021-08-10T00:36:12.291Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2021-08-10T00:36:12.291Z] 00:36:12     INFO - Buffered messages logged at 00:35:28
[task 2021-08-10T00:36:12.292Z] 00:36:12     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory" {file: "resource:///modules/sessionstore/ContentSessionStore.jsm" line: 477}]
[task 2021-08-10T00:36:12.292Z] 00:36:12     INFO - send@resource:///modules/sessionstore/ContentSessionStore.jsm:477:9
[task 2021-08-10T00:36:12.293Z] 00:36:12     INFO - sendWhenIdle@resource:///modules/sessionstore/ContentSessionStore.jsm:431:14
[task 2021-08-10T00:36:12.293Z] 00:36:12     INFO - sendWhenIdle/<@resource:///modules/sessionstore/ContentSessionStore.jsm:438:48
[task 2021-08-10T00:36:12.293Z] 00:36:12     INFO - 
[task 2021-08-10T00:36:12.293Z] 00:36:12     INFO - Buffered messages finished
[task 2021-08-10T00:36:12.294Z] 00:36:12     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_warning_permanent_private_browsing.js | Test timed out - 
[task 2021-08-10T00:36:12.296Z] 00:36:12     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-08-10T00:36:12.296Z] 00:36:12     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_warning_permanent_private_browsing.js | Uncaught exception received from previously timed out test - sync-pane-loaded observer not removed before the end of test
[task 2021-08-10T00:36:12.296Z] 00:36:12     INFO - GECKO(4292) | MEMORY STAT | vsize 1942MB | vsizeMaxContiguous 4MB | residentFast 926MB | heapAllocated 739MB
[task 2021-08-10T00:36:12.296Z] 00:36:12     INFO - TEST-OK | browser/components/preferences/tests/browser_warning_permanent_private_browsing.js | took 45056ms
[task 2021-08-10T00:36:12.298Z] 00:36:12     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-08-10T00:36:12.298Z] 00:36:12     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_warning_permanent_private_browsing.js | Found a tab after previous test timed out: about:preferences#privacy - 
[task 2021-08-10T00:36:12.299Z] 00:36:12     INFO - GECKO(4292) | JavaScript error: resource:///modules/sessionstore/ContentSessionStore.jsm, line 467: Error: TelemetryStopwatch: key "FX_SESSION_RESTORE_CONTENT_COLLECT_DATA_MS" was already initialized
[task 2021-08-10T00:36:12.299Z] 00:36:12     INFO - GECKO(4292) | JavaScript error: resource:///modules/sessionstore/ContentSessionStore.jsm, line 473: Error: TelemetryStopwatch: finishing nonexisting stopwatch. Histogram: "FX_SESSION_RESTORE_CONTENT_COLLECT_DATA_MS", key: "historychange"
[task 2021-08-10T00:36:12.303Z] 00:36:12     INFO - checking window state
[task 2021-08-10T00:36:12.314Z] 00:36:12     INFO - Console message: [JavaScript Error: "Error: TelemetryStopwatch: key "FX_SESSION_RESTORE_CONTENT_COLLECT_DATA_MS" was already initialized" {file: "resource:///modules/sessionstore/ContentSessionStore.jsm" line: 467}]
[task 2021-08-10T00:36:12.314Z] 00:36:12     INFO - send@resource:///modules/sessionstore/ContentSessionStore.jsm:467:28
[task 2021-08-10T00:36:12.314Z] 00:36:12     INFO - onUnload@resource:///modules/sessionstore/ContentSessionStore.jsm:680:23
[task 2021-08-10T00:36:12.315Z] 00:36:12     INFO - handleEvent@resource:///modules/sessionstore/ContentSessionStore.jsm:673:12
[task 2021-08-10T00:36:12.315Z] 00:36:12     INFO - _endRemoveTab@chrome://browser/content/tabbrowser.js:3988:15
[task 2021-08-10T00:36:12.315Z] 00:36:12     INFO - removeTab@chrome://browser/content/tabbrowser.js:3621:14
[task 2021-08-10T00:36:12.315Z] 00:36:12     INFO - Tester_waitForWindowsState@chrome://mochikit/content/browser-test.js:412:18
[task 2021-08-10T00:36:12.315Z] 00:36:12     INFO - nextTest@chrome://mochikit/content/browser-test.js:833:10
[task 2021-08-10T00:36:12.315Z] 00:36:12     INFO - 
[task 2021-08-10T00:36:12.317Z] 00:36:12     INFO - Console message: [JavaScript Error: "Error: TelemetryStopwatch: finishing nonexisting stopwatch. Histogram: "FX_SESSION_RESTORE_CONTENT_COLLECT_DATA_MS", key: "historychange"" {file: "resource:///modules/sessionstore/ContentSessionStore.jsm" line: 473}]
[task 2021-08-10T00:36:12.317Z] 00:36:12     INFO - send@resource:///modules/sessionstore/ContentSessionStore.jsm:473:28
[task 2021-08-10T00:36:12.317Z] 00:36:12     INFO - onUnload@resource:///modules/sessionstore/ContentSessionStore.jsm:680:23
[task 2021-08-10T00:36:12.317Z] 00:36:12     INFO - handleEvent@resource:///modules/sessionstore/ContentSessionStore.jsm:673:12
[task 2021-08-10T00:36:12.317Z] 00:36:12     INFO - _endRemoveTab@chrome://browser/content/tabbrowser.js:3988:15
[task 2021-08-10T00:36:12.317Z] 00:36:12     INFO - removeTab@chrome://browser/content/tabbrowser.js:3621:14
[task 2021-08-10T00:36:12.317Z] 00:36:12     INFO - Tester_waitForWindowsState@chrome://mochikit/content/browser-test.js:412:18
[task 2021-08-10T00:36:12.317Z] 00:36:12     INFO - nextTest@chrome://mochikit/content/browser-test.js:833:10
[task 2021-08-10T00:36:12.317Z] 00:36:12     INFO - 
[task 2021-08-10T00:36:12.322Z] 00:36:12     INFO - GECKO(4292) | Completed ShutdownLeaks collections in process 3612
[task 2021-08-10T00:36:12.322Z] 00:36:12     INFO - TEST-START | Shutdown
```