Bug: Intermittent browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureA after next search -
Status: RESOLVED
Priority: P5
Resolution: FIXED
Created: 2021-08-04 06:25:38+00:00
Resolved: 2021-08-31 11:07:19+00:00

**Filed by:** malexandru [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=347332970&repo=mozilla-central
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Vmxx00VoR5OSBFnCGIkzYA/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2021-08-04T04:37:11.984Z] 04:37:11     INFO - TEST-START | browser/components/preferences/tests/browser_experimental_features_filter.js
[task 2021-08-04T04:37:12.054Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7fc96ea91400 == 26 [pid = 6093] [id = 288]
[task 2021-08-04T04:37:12.056Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 122 (7fc993974040) [pid = 6093] [serial = 754] [outer = 0]
[task 2021-08-04T04:37:12.058Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 123 (7fc96f3de400) [pid = 6093] [serial = 755] [outer = 7fc993974040]
[task 2021-08-04T04:37:12.169Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 124 (7fc972289400) [pid = 6093] [serial = 756] [outer = 7fc993974040]
[task 2021-08-04T04:37:12.349Z] 04:37:12     INFO - GECKO(6093) | [Child 6264: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7fd5bf260c00 == 1 [pid = 6264] [id = 47] [url = about:blank]
[task 2021-08-04T04:37:12.350Z] 04:37:12     INFO - GECKO(6093) | [Child 6264: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 4 (7fd5bf265c00) [pid = 6264] [serial = 95] [outer = 0] [url = about:blank]
[task 2021-08-04T04:37:12.431Z] 04:37:12     INFO - GECKO(6093) | [Child 6264: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 3 (7fd5d9c643c0) [pid = 6264] [serial = 96] [outer = 0] [url = about:blank]
[task 2021-08-04T04:37:12.565Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7fc974013000 == 25 [pid = 6093] [id = 281] [url = about:blank]
[task 2021-08-04T04:37:12.576Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80004005 (NS_ERROR_FAILURE): file /builds/worker/checkouts/gecko/dom/base/nsContentUtils.cpp:4002
[task 2021-08-04T04:37:12.579Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7fc96ea87800 == 26 [pid = 6093] [id = 289]
[task 2021-08-04T04:37:12.580Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 125 (7fc968dfe040) [pid = 6093] [serial = 757] [outer = 0]
[task 2021-08-04T04:37:12.623Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_TRUE(presShell) failed: file /builds/worker/checkouts/gecko/dom/base/nsGlobalWindowOuter.cpp:4225
[task 2021-08-04T04:37:12.663Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_TRUE(GetOwner() && !mCanceled) failed: file /builds/worker/checkouts/gecko/image/imgRequestProxy.cpp:909
[task 2021-08-04T04:37:12.664Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_TRUE(GetOwner() && !mCanceled) failed: file /builds/worker/checkouts/gecko/image/imgRequestProxy.cpp:909
[task 2021-08-04T04:37:12.683Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 126 (7fc9708d0c00) [pid = 6093] [serial = 758] [outer = 7fc968dfe040]
[task 2021-08-04T04:37:12.691Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: '!wc', file /builds/worker/checkouts/gecko/dom/base/ThirdPartyUtil.cpp:226
[task 2021-08-04T04:37:12.691Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: '!wc', file /builds/worker/checkouts/gecko/dom/base/ThirdPartyUtil.cpp:226
[task 2021-08-04T04:37:12.924Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:12.925Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:12.925Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:12.926Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:12.926Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:12.926Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:12.927Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:12.927Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:12.931Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:12.932Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:12.932Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:12.933Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:12.957Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_TRUE(GetOwner() && !mCanceled) failed: file /builds/worker/checkouts/gecko/image/imgRequestProxy.cpp:909
[task 2021-08-04T04:37:12.958Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_TRUE(GetOwner() && !mCanceled) failed: file /builds/worker/checkouts/gecko/image/imgRequestProxy.cpp:909
[task 2021-08-04T04:37:12.963Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:12.963Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:12.964Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:12.965Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:12.966Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:12.966Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:12.967Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:12.968Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:12.969Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:12.973Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:12.974Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:12.975Z] 04:37:12     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:13.091Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_TRUE(GetOwner() && !mCanceled) failed: file /builds/worker/checkouts/gecko/image/imgRequestProxy.cpp:909
[task 2021-08-04T04:37:13.092Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_TRUE(GetOwner() && !mCanceled) failed: file /builds/worker/checkouts/gecko/image/imgRequestProxy.cpp:909
[task 2021-08-04T04:37:13.099Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:13.099Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:13.100Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:13.101Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:13.102Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:13.103Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:13.149Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_TRUE(GetOwner() && !mCanceled) failed: file /builds/worker/checkouts/gecko/image/imgRequestProxy.cpp:909
[task 2021-08-04T04:37:13.151Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_TRUE(GetOwner() && !mCanceled) failed: file /builds/worker/checkouts/gecko/image/imgRequestProxy.cpp:909
[task 2021-08-04T04:37:13.154Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:13.155Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:13.178Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_TRUE(GetOwner() && !mCanceled) failed: file /builds/worker/checkouts/gecko/image/imgRequestProxy.cpp:909
[task 2021-08-04T04:37:13.179Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_TRUE(GetOwner() && !mCanceled) failed: file /builds/worker/checkouts/gecko/image/imgRequestProxy.cpp:909
[task 2021-08-04T04:37:13.253Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_TRUE(GetOwner() && !mCanceled) failed: file /builds/worker/checkouts/gecko/image/imgRequestProxy.cpp:909
[task 2021-08-04T04:37:13.254Z] 04:37:13     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: NS_ENSURE_TRUE(GetOwner() && !mCanceled) failed: file /builds/worker/checkouts/gecko/image/imgRequestProxy.cpp:909
[task 2021-08-04T04:37:13.464Z] 04:37:13     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:13.470Z] 04:37:13     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:13.476Z] 04:37:13     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:13.481Z] 04:37:13     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:13.486Z] 04:37:13     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:13.490Z] 04:37:13     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:13.496Z] 04:37:13     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:13.610Z] 04:37:13     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:14.341Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:14.346Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:14.346Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:14.346Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:14.346Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:14.346Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:14.346Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:14.346Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:14.346Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:14.347Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:14.347Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:14.348Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:14.365Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:14.366Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:14.367Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:14.368Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:14.369Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:14.370Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:14.371Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
[task 2021-08-04T04:37:14.373Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeEnd` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:671
[task 2021-08-04T04:37:14.418Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7fc96d018c00 == 25 [pid = 6093] [id = 273] [url = about:blank]
[task 2021-08-04T04:37:14.419Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7fc97a10d000 == 24 [pid = 6093] [id = 279] [url = about:blank]
[task 2021-08-04T04:37:14.420Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7fc96f9e6400 == 23 [pid = 6093] [id = 283] [url = about:blank]
[task 2021-08-04T04:37:14.423Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7fc9705c4000 == 22 [pid = 6093] [id = 275] [url = about:blank]
[task 2021-08-04T04:37:14.425Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7fc96d022c00 == 21 [pid = 6093] [id = 264] [url = about:preferences#privacy]
[task 2021-08-04T04:37:14.425Z] 04:37:14     INFO - GECKO(6093) | [Parent 6093: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7fc9782a6400 == 20 [pid = 6093] [id = 277] [url = about:blank]
[task 2021-08-04T04:37:14.431Z] 04:37:14     INFO - TEST-INFO | started process screentopng
[task 2021-08-04T04:37:14.659Z] 04:37:14     INFO - TEST-INFO | screentopng: exit 0
[task 2021-08-04T04:37:14.659Z] 04:37:14     INFO - Buffered messages logged at 04:37:11
[task 2021-08-04T04:37:14.659Z] 04:37:14     INFO - Entering test bound testFilterFeatures
[task 2021-08-04T04:37:14.660Z] 04:37:14     INFO - Buffered messages logged at 04:37:12
[task 2021-08-04T04:37:14.662Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.663Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureA not initially hidden - 
[task 2021-08-04T04:37:14.665Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.665Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureB not initially hidden - 
[task 2021-08-04T04:37:14.668Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.669Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureC not initially hidden - 
[task 2021-08-04T04:37:14.669Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.670Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureD not initially hidden - 
[task 2021-08-04T04:37:14.670Z] 04:37:14     INFO - Buffered messages logged at 04:37:13
[task 2021-08-04T04:37:14.670Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.671Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureA after first search - 
[task 2021-08-04T04:37:14.673Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.674Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureB after first search - 
[task 2021-08-04T04:37:14.675Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.676Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureC after first search - 
[task 2021-08-04T04:37:14.678Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.678Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureD after first search - 
[task 2021-08-04T04:37:14.679Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.680Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureA after further search - 
[task 2021-08-04T04:37:14.681Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.682Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureB after further search - 
[task 2021-08-04T04:37:14.683Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.684Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureC after further search - 
[task 2021-08-04T04:37:14.685Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.686Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureD after further search - 
[task 2021-08-04T04:37:14.687Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.688Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureA not hidden after search cleared - 
[task 2021-08-04T04:37:14.689Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.690Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureB not hidden after search cleared - 
[task 2021-08-04T04:37:14.690Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.691Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureC not hidden after search cleared - 
[task 2021-08-04T04:37:14.692Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.693Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureD not hidden after search cleared - 
[task 2021-08-04T04:37:14.695Z] 04:37:14     INFO - Buffered messages logged at 04:37:14
[task 2021-08-04T04:37:14.696Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.697Z] 04:37:14     INFO - Buffered messages finished
[task 2021-08-04T04:37:14.698Z] 04:37:14     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureA after next search - 
[task 2021-08-04T04:37:14.698Z] 04:37:14     INFO - Stack trace:
[task 2021-08-04T04:37:14.699Z] 04:37:14     INFO - chrome://mochikit/content/browser-test.js:test_ok:1343
[task 2021-08-04T04:37:14.699Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/head.js:is_element_visible:12
[task 2021-08-04T04:37:14.700Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:checkVisibility:159
[task 2021-08-04T04:37:14.701Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:testFilterFeatures:129
[task 2021-08-04T04:37:14.702Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.702Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureB after next search - 
[task 2021-08-04T04:37:14.703Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.704Z] 04:37:14     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-08-04T04:37:14.706Z] 04:37:14     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureC after next search - 
[task 2021-08-04T04:37:14.706Z] 04:37:14     INFO - Stack trace:
[task 2021-08-04T04:37:14.706Z] 04:37:14     INFO - chrome://mochikit/content/browser-test.js:test_ok:1343
[task 2021-08-04T04:37:14.707Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/head.js:is_element_visible:12
[task 2021-08-04T04:37:14.707Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:checkVisibility:159
[task 2021-08-04T04:37:14.707Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:testFilterFeatures:129
[task 2021-08-04T04:37:14.708Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.709Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureD after next search - 
[task 2021-08-04T04:37:14.710Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.711Z] 04:37:14     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-08-04T04:37:14.712Z] 04:37:14     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureA not hidden after category change to category-search - 
[task 2021-08-04T04:37:14.712Z] 04:37:14     INFO - Stack trace:
[task 2021-08-04T04:37:14.713Z] 04:37:14     INFO - chrome://mochikit/content/browser-test.js:test_ok:1343
[task 2021-08-04T04:37:14.713Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/head.js:is_element_visible:12
[task 2021-08-04T04:37:14.713Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:checkVisibility:159
[task 2021-08-04T04:37:14.714Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:testFilterFeatures:143
[task 2021-08-04T04:37:14.715Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.715Z] 04:37:14     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-08-04T04:37:14.717Z] 04:37:14     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureB not hidden after category change to category-search - 
[task 2021-08-04T04:37:14.717Z] 04:37:14     INFO - Stack trace:
[task 2021-08-04T04:37:14.717Z] 04:37:14     INFO - chrome://mochikit/content/browser-test.js:test_ok:1343
[task 2021-08-04T04:37:14.717Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/head.js:is_element_visible:12
[task 2021-08-04T04:37:14.717Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:checkVisibility:159
[task 2021-08-04T04:37:14.717Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:testFilterFeatures:143
[task 2021-08-04T04:37:14.717Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.718Z] 04:37:14     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-08-04T04:37:14.719Z] 04:37:14     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureC not hidden after category change to category-search - 
[task 2021-08-04T04:37:14.719Z] 04:37:14     INFO - Stack trace:
[task 2021-08-04T04:37:14.719Z] 04:37:14     INFO - chrome://mochikit/content/browser-test.js:test_ok:1343
[task 2021-08-04T04:37:14.719Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/head.js:is_element_visible:12
[task 2021-08-04T04:37:14.719Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:checkVisibility:159
[task 2021-08-04T04:37:14.719Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:testFilterFeatures:143
[task 2021-08-04T04:37:14.720Z] 04:37:14     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:14.721Z] 04:37:14     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-08-04T04:37:14.722Z] 04:37:14     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureD not hidden after category change to category-search - 
[task 2021-08-04T04:37:14.722Z] 04:37:14     INFO - Stack trace:
[task 2021-08-04T04:37:14.722Z] 04:37:14     INFO - chrome://mochikit/content/browser-test.js:test_ok:1343
[task 2021-08-04T04:37:14.722Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/head.js:is_element_visible:12
[task 2021-08-04T04:37:14.722Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:checkVisibility:159
[task 2021-08-04T04:37:14.722Z] 04:37:14     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:testFilterFeatures:143
[task 2021-08-04T04:37:14.988Z] 04:37:14     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:14.990Z] 04:37:14     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:14.991Z] 04:37:14     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:14.994Z] 04:37:14     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:14.997Z] 04:37:14     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:15.000Z] 04:37:15     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:15.004Z] 04:37:15     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:15.007Z] 04:37:15     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:15.012Z] 04:37:15     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:15.016Z] 04:37:15     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:15.021Z] 04:37:15     INFO - GECKO(6093) | Warning: asking to enable_gpu_markers but no supporting extension was found
[task 2021-08-04T04:37:15.153Z] 04:37:15     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: `CompareToRangeStart` couldn't compare nodes, pretending some order.: file /builds/worker/checkouts/gecko/dom/base/Selection.cpp:651
<...>
[task 2021-08-04T04:37:15.725Z] 04:37:15     INFO - TEST-PASS | browser/components/preferences/tests/browser_experimental_features_filter.js | Element should not be null, when checking visibility - 
[task 2021-08-04T04:37:15.731Z] 04:37:15     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-08-04T04:37:15.732Z] 04:37:15     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_experimental_features_filter.js | item test-featureD not hidden after category change to category-experimental - 
[task 2021-08-04T04:37:15.733Z] 04:37:15     INFO - Stack trace:
[task 2021-08-04T04:37:15.733Z] 04:37:15     INFO - chrome://mochikit/content/browser-test.js:test_ok:1343
[task 2021-08-04T04:37:15.733Z] 04:37:15     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/head.js:is_element_visible:12
[task 2021-08-04T04:37:15.733Z] 04:37:15     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:checkVisibility:159
[task 2021-08-04T04:37:15.734Z] 04:37:15     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_experimental_features_filter.js:testFilterFeatures:143
[task 2021-08-04T04:37:15.763Z] 04:37:15     INFO - GECKO(6093) | [Parent 6093, Main Thread] WARNING: '!inner', file /builds/worker/checkouts/gecko/dom/ipc/jsactor/JSWindowActorProtocol.cpp:184
[task 2021-08-04T04:37:15.771Z] 04:37:15     INFO - Leaving test bound testFilterFeatures
[task 2021-08-04T04:37:15.853Z] 04:37:15     INFO - GECKO(6093) | MEMORY STAT | vsize 3825MB | residentFast 713MB | heapAllocated 369MB
[task 2021-08-04T04:37:15.855Z] 04:37:15     INFO - TEST-OK | browser/components/preferences/tests/browser_experimental_features_filter.js | took 3870ms
[task 2021-08-04T04:37:15.864Z] 04:37:15     INFO - GECKO(6093) | [Child 6164: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7f14f3556c00 == 2 [pid = 6164] [id = 38]
[task 2021-08-04T04:37:15.864Z] 04:37:15     INFO - GECKO(6093) | [Child 6164: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (7f150de64200) [pid = 6164] [serial = 78] [outer = 0]
[task 2021-08-04T04:37:15.866Z] 04:37:15     INFO - GECKO(6093) | [Child 6164: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 4 (7f14f3558400) [pid = 6164] [serial = 79] [outer = 7f150de64200]
[task 2021-08-04T04:37:15.917Z] 04:37:15     INFO - checking window state
[task 2021-08-04T04:37:15.995Z] 04:37:15     INFO - TEST-START | browser/components/preferences/tests/browser_experimental_features_hidden_when_not_public.js
```