Bug: Intermittent browser/base/content/test/metaTags/browser_meta_tags.js | Uncaught exception - undefined - timed out after 50 tries.
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2021-03-23 11:48:58+00:00
Resolved: 2021-04-20 17:03:29+00:00

**Filed by:** smolnar [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=334117292&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/BbuKXsw7TXaKhWuvn_U6cA/runs/0/artifacts/public/logs/live_backing.log

---
```
INFO - TEST-START | browser/base/content/test/metaTags/browser_meta_tags.js
[task 2021-03-23T10:17:53.472Z] 10:17:53     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 72b3400 == 2 [pid = 3688] [id = 1]
[task 2021-03-23T10:17:53.472Z] 10:17:53     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 4 (10e3100) [pid = 3688] [serial = 4] [outer = 0]
[task 2021-03-23T10:17:53.472Z] 10:17:53     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 5 (72b5000) [pid = 3688] [serial = 5] [outer = 10e3100]
[task 2021-03-23T10:17:53.611Z] 10:17:53     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 6 (72bec00) [pid = 3688] [serial = 6] [outer = 10e3100]
[task 2021-03-23T10:17:54.926Z] 10:17:54     INFO - GECKO(5796) | [Parent 5300, Main Thread] WARNING: Suboptimal indexes for the SQL statement 0x145b0970 (http://mzl.la/1FuID0j).: file /builds/worker/checkouts/gecko/storage/mozStoragePrivateHelpers.cpp:113
[task 2021-03-23T10:17:54.941Z] 10:17:54     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 6db8800 == 3 [pid = 2180] [id = 2]
[task 2021-03-23T10:17:54.941Z] 10:17:54     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 6 (9f82100) [pid = 2180] [serial = 6] [outer = 0]
[task 2021-03-23T10:17:54.941Z] 10:17:54     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 7 (6dc0000) [pid = 2180] [serial = 7] [outer = 9f82100]
[task 2021-03-23T10:17:55.088Z] 10:17:55     INFO - GECKO(5796) | [Child 2180, Main Thread] WARNING: NS_ENSURE_TRUE(info) failed: file /builds/worker/checkouts/gecko/extensions/permissions/PermissionDelegateHandler.cpp:348
[task 2021-03-23T10:17:55.091Z] 10:17:55     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 8 (9f9b400) [pid = 2180] [serial = 8] [outer = 9f82100]
[task 2021-03-23T10:17:55.258Z] 10:17:55     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 72b5800 == 3 [pid = 3688] [id = 2]
[task 2021-03-23T10:17:55.258Z] 10:17:55     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 7 (a571a00) [pid = 3688] [serial = 7] [outer = 0]
[task 2021-03-23T10:17:55.258Z] 10:17:55     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 8 (72bb000) [pid = 3688] [serial = 8] [outer = a571a00]
[task 2021-03-23T10:17:55.298Z] 10:17:55     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 9 (72bf800) [pid = 3688] [serial = 9] [outer = a571a00]
[task 2021-03-23T10:17:56.993Z] 10:17:56     INFO - GECKO(5796) | [Child 4104, Main Thread] WARNING: early callback, or time went backwards: '!aAllowIdleDispatch', file /builds/worker/checkouts/gecko/xpcom/threads/IdleTaskRunner.cpp:179
[task 2021-03-23T10:17:57.048Z] 10:17:57     INFO - GECKO(5796) | [Child 4104: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 15acc00 == 1 [pid = 4104] [id = 0] [url = about:blank]
[task 2021-03-23T10:17:58.315Z] 10:17:58     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL aa7800 == 2 [pid = 2180] [id = 0] [url = chrome://gfxsanity/content/sanitytest.html]
[task 2021-03-23T10:17:58.315Z] 10:17:58     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 6db7800 == 1 [pid = 2180] [id = 1] [url = about:blank]
[task 2021-03-23T10:17:58.342Z] 10:17:58     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 7 (a66300) [pid = 2180] [serial = 1] [outer = 0] [url = chrome://gfxsanity/content/sanitytest.html]
[task 2021-03-23T10:17:58.342Z] 10:17:58     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 6 (6dfcd00) [pid = 2180] [serial = 4] [outer = 0] [url = about:blank]
[task 2021-03-23T10:17:58.949Z] 10:17:58     INFO - GECKO(5796) | [Child 5068: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 70d5400 == 4 [pid = 5068] [id = 2] [url = moz-extension://e75161a3-e955-43dc-979b-55a711ae559d/_generated_background_page.html]
[task 2021-03-23T10:17:58.949Z] 10:17:58     INFO - GECKO(5796) | [Child 5068: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 14 (f7cf00) [pid = 5068] [serial = 5] [outer = 0] [url = moz-extension://e75161a3-e955-43dc-979b-55a711ae559d/_generated_background_page.html]
[task 2021-03-23T10:18:00.104Z] 10:18:00     INFO - GECKO(5796) | [Parent 5300: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 1563c800 == 6 [pid = 5300] [id = 5] [url = about:blank]
[task 2021-03-23T10:18:00.104Z] 10:18:00     INFO - GECKO(5796) | [Parent 5300: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 1af74800 == 5 [pid = 5300] [id = 6] [url = about:blank]
[task 2021-03-23T10:18:00.259Z] 10:18:00     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 10b8c00 == 2 [pid = 3688] [id = 0] [url = https://example.com/browser/browser/base/content/test/metaTags/bad_meta_tags.html]
[task 2021-03-23T10:18:00.259Z] 10:18:00     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 72b3400 == 1 [pid = 3688] [id = 1] [url = https://example.com/browser/browser/base/content/test/metaTags/meta_tags.html]
[task 2021-03-23T10:18:00.286Z] 10:18:00     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 8 (1066f00) [pid = 3688] [serial = 1] [outer = 0] [url = https://example.com/browser/browser/base/content/test/metaTags/bad_meta_tags.html]
[task 2021-03-23T10:18:00.286Z] 10:18:00     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 7 (10e3100) [pid = 3688] [serial = 4] [outer = 0] [url = https://example.com/browser/browser/base/content/test/metaTags/meta_tags.html]
[task 2021-03-23T10:18:00.381Z] 10:18:00     INFO - GECKO(5796) | [Parent 5300: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 16 (1be0d400) [pid = 5300] [serial = 13] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:00.381Z] 10:18:00     INFO - GECKO(5796) | [Parent 5300: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 15 (14ed1b00) [pid = 5300] [serial = 12] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:00.381Z] 10:18:00     INFO - GECKO(5796) | [Parent 5300: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 14 (fb0ae00) [pid = 5300] [serial = 1] [outer = 0] [url = chrome://gfxsanity/content/sanityparent.html]
[task 2021-03-23T10:18:00.764Z] 10:18:00     INFO - TEST-INFO | started process screenshot
[task 2021-03-23T10:18:00.819Z] 10:18:00     INFO - TEST-INFO | screenshot: exit 0
[task 2021-03-23T10:18:00.820Z] 10:18:00     INFO - Buffered messages logged at 10:17:53
[task 2021-03-23T10:18:00.820Z] 10:18:00     INFO - Entering test bound test_metadata
[task 2021-03-23T10:18:00.820Z] 10:18:00     INFO - Buffered messages logged at 10:17:54
 INFO - TEST-PASS | browser/base/content/test/metaTags/browser_meta_tags.js | got the correct description - 
[task 2021-03-23T10:18:00.821Z] 10:18:00     INFO - TEST-PASS | browser/base/content/test/metaTags/browser_meta_tags.js | got the correct preview image - 
[task 2021-03-23T10:18:00.822Z] 10:18:00     INFO - Leaving test bound test_metadata
[task 2021-03-23T10:18:00.822Z] 10:18:00     INFO - Entering test bound multiple_tabs
[task 2021-03-23T10:18:00.822Z] 10:18:00     INFO - Buffered messages finished
[task 2021-03-23T10:18:00.822Z] 10:18:00     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/metaTags/browser_meta_tags.js | Uncaught exception - undefined - timed out after 50 tries.
[task 2021-03-23T10:18:00.822Z] 10:18:00     INFO - Leaving test bound multiple_tabs
[task 2021-03-23T10:18:00.823Z] 10:18:00     INFO - GECKO(5796) | MEMORY STAT | vsize 837MB | vsizeMaxContiguous 364MB | residentFast 239MB | heapAllocated 88MB
[task 2021-03-23T10:18:00.823Z] 10:18:00     INFO - TEST-OK | browser/base/content/test/metaTags/browser_meta_tags.js | took 7326ms
[task 2021-03-23T10:18:00.823Z] 10:18:00     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-03-23T10:18:00.823Z] 10:18:00     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/metaTags/browser_meta_tags.js | Found an unexpected tab at the end of test run: about:blank - 
[task 2021-03-23T10:18:00.823Z] 10:18:00     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-03-23T10:18:00.823Z] 10:18:00     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/metaTags/browser_meta_tags.js | Found an unexpected tab at the end of test run: https://example.com/browser/browser/base/content/test/metaTags/meta_tags.html - 
[task 2021-03-23T10:18:00.830Z] 10:18:00     INFO - GECKO(5796) | [Child 3104: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 17ab400 == 1 [pid = 3104] [id = 0]
[task 2021-03-23T10:18:00.830Z] 10:18:00     INFO - GECKO(5796) | [Child 3104: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 1 (1766f00) [pid = 3104] [serial = 1] [outer = 0]
[task 2021-03-23T10:18:00.830Z] 10:18:00     INFO - GECKO(5796) | [Child 3104: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (2db2400) [pid = 3104] [serial = 2] [outer = 1766f00]
[task 2021-03-23T10:18:00.849Z] 10:18:00     INFO - checking window state
INFO - GECKO(5796) | [Parent 5300: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 15 (fbd2000) [pid = 5300] [serial = 18] [outer = 145d8200]
[task 2021-03-23T10:18:00.899Z] 10:18:00     INFO - GECKO(5796) | [Child 4188, Main Thread] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80040111 (NS_ERROR_NOT_AVAILABLE): file /builds/worker/checkouts/gecko/caps/BasePrincipal.cpp:1349
[task 2021-03-23T10:18:00.929Z] 10:18:00     INFO - GECKO(5796) | [Parent 5300, Main Thread] WARNING: NS_ENSURE_TRUE(presShell) failed: file /builds/worker/checkouts/gecko/dom/base/nsGlobalWindowOuter.cpp:4254
[task 2021-03-23T10:18:00.971Z] 10:18:00     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 6 (72bb000) [pid = 3688] [serial = 8] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:00.971Z] 10:18:00     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 5 (72b8c00) [pid = 3688] [serial = 3] [outer = 0] [url = https://example.com/browser/browser/base/content/test/metaTags/bad_meta_tags.html]
[task 2021-03-23T10:18:00.972Z] 10:18:00     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 4 (72b1800) [pid = 3688] [serial = 2] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:00.972Z] 10:18:00     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 3 (72bec00) [pid = 3688] [serial = 6] [outer = 0] [url = https://example.com/browser/browser/base/content/test/metaTags/meta_tags.html]
[task 2021-03-23T10:18:00.972Z] 10:18:00     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (72b5000) [pid = 3688] [serial = 5] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:00.972Z] 10:18:00     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 72b5800 == 0 [pid = 3688] [id = 2] [url = about:blank]
[task 2021-03-23T10:18:01.019Z] 10:18:01     INFO - GECKO(5796) | [Child 4188: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (db0c00) [pid = 4188] [serial = 2] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.034Z] 10:18:01     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 5 (6dc0000) [pid = 2180] [serial = 7] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.035Z] 10:18:01     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 4 (6dbc400) [pid = 2180] [serial = 5] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.035Z] 10:18:01     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 3 (aaa400) [pid = 2180] [serial = 2] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.035Z] 10:18:01     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (6dba000) [pid = 2180] [serial = 3] [outer = 0] [url = chrome://gfxsanity/content/sanitytest.html]
[task 2021-03-23T10:18:01.035Z] 10:18:01     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 6db8800 == 0 [pid = 2180] [id = 2] [url = https://example.com/browser/browser/base/content/test/metaTags/meta_tags.html]
[task 2021-03-23T10:18:01.035Z] 10:18:01     INFO - GECKO(5796) | [Child 4188, Main Thread] WARNING: NS_ENSURE_TRUE(!mHasOrHasHadOwnerWindow || mOwnerWindow) failed: file /builds/worker/checkouts/gecko/dom/events/DOMEventTargetHelper.cpp:327
[task 2021-03-23T10:18:01.042Z] 10:18:01     INFO - GECKO(5796) | [Child 4104: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 5 (15af400) [pid = 4104] [serial = 2] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.042Z] 10:18:01     INFO - GECKO(5796) | [Child 4104: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 76b3c00 == 0 [pid = 4104] [id = 1] [url = about:blank]
[task 2021-03-23T10:18:01.062Z] 10:18:01     INFO - GECKO(5796) | [Child 4104: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 4 (76bb400) [pid = 4104] [serial = 4] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.062Z] 10:18:01     INFO - GECKO(5796) | [Child 4104: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 3 (1566300) [pid = 4104] [serial = 1] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.062Z] 10:18:01     INFO - GECKO(5796) | [Child 4104: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (76b7000) [pid = 4104] [serial = 3] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.065Z] 10:18:01     INFO - GECKO(5796) | [Child 5068: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 13 (a432400) [pid = 5068] [serial = 13] [outer = 0] [url = moz-extension://e75161a3-e955-43dc-979b-55a711ae559d/_generated_background_page.html]
[task 2021-03-23T10:18:01.065Z] 10:18:01     INFO - GECKO(5796) | [Child 5068: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 12 (70dc000) [pid = 5068] [serial = 10] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.066Z] 10:18:01     INFO - GECKO(5796) | [Child 5068: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 11 (70d4000) [pid = 5068] [serial = 4] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.066Z] 10:18:01     INFO - GECKO(5796) | [Child 5068: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 10 (70d9800) [pid = 5068] [serial = 8] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.066Z] 10:18:01     INFO - GECKO(5796) | [Child 5068: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 9 (70d0c00) [pid = 5068] [serial = 2] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.066Z] 10:18:01     INFO - GECKO(5796) | [Child 5068: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 8 (70d6c00) [pid = 5068] [serial = 6] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.093Z] 10:18:01     INFO - GECKO(5796) | [Child 4104: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (76f2800) [pid = 4104] [serial = 5] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.454Z] 10:18:01     INFO - GECKO(5796) | [Parent 5300: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 14 (fbcd000) [pid = 5300] [serial = 2] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.454Z] 10:18:01     INFO - GECKO(5796) | [Parent 5300: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 13 (1b827800) [pid = 5300] [serial = 14] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.454Z] 10:18:01     INFO - GECKO(5796) | [Parent 5300: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 12 (1b821400) [pid = 5300] [serial = 15] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.454Z] 10:18:01     INFO - GECKO(5796) | [Parent 5300: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 11 (15d35400) [pid = 5300] [serial = 10] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.771Z] 10:18:01     INFO - GECKO(5796) | [Child 4104: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (76b9800) [pid = 4104] [serial = 6] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.842Z] 10:18:01     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (72bf800) [pid = 3688] [serial = 9] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.842Z] 10:18:01     INFO - GECKO(5796) | [Child 3688: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (a571a00) [pid = 3688] [serial = 7] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:01.842Z] 10:18:01     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (9f82100) [pid = 2180] [serial = 6] [outer = 0] [url = https://example.com/browser/browser/base/content/test/metaTags/meta_tags.html]
[task 2021-03-23T10:18:01.843Z] 10:18:01     INFO - GECKO(5796) | [Child 2180: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (9f9b400) [pid = 2180] [serial = 8] [outer = 0] [url = https://example.com/browser/browser/base/content/test/metaTags/meta_tags.html]
[task 2021-03-23T10:18:01.998Z] 10:18:01     INFO - GECKO(5796) | [Child 4188: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL dae000 == 0 [pid = 4188] [id = 0] [url = about:newtab]
 INFO - GECKO(5796) | [Child 4188: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (d66f00) [pid = 4188] [serial = 1] [outer = 0] [url = about:newtab]
[task 2021-03-23T10:18:01.998Z] 10:18:01     INFO - GECKO(5796) | [Child 4188: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (6ec5400) [pid = 4188] [serial = 3] [outer = 0] [url = about:newtab]
[task 2021-03-23T10:18:02.818Z] 10:18:02     INFO - GECKO(5796) | Completed ShutdownLeaks collections in process 3104
[task 2021-03-23T10:18:02.833Z] 10:18:02     INFO - GECKO(5796) | [Parent 5300: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 10 (15d30c00) [pid = 5300] [serial = 8] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:02.860Z] 10:18:02     INFO - GECKO(5796) | Completed ShutdownLeaks collections in process 4104
[task 2021-03-23T10:18:02.916Z] 10:18:02     INFO - GECKO(5796) | Completed ShutdownLeaks collections in process 3688
[task 2021-03-23T10:18:02.935Z] 10:18:02     INFO - GECKO(5796) | Completed ShutdownLeaks collections in process 2180
[task 2021-03-23T10:18:03.078Z] 10:18:03     INFO - GECKO(5796) | Completed ShutdownLeaks collections in process 4188
[task 2021-03-23T10:18:03.153Z] 10:18:03     INFO - GECKO(5796) | Completed ShutdownLeaks collections in process 5068
[task 2021-03-23T10:18:03.254Z] 10:18:03     INFO - GECKO(5796) | [Parent 5300: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 11 (fbc5800) [pid = 5300] [serial = 19] [outer = 145d8200]
[task 2021-03-23T10:18:03.394Z] 10:18:03     INFO - GECKO(5796) | ### XPCOM_MEM_BLOAT_LOG defined -- logging bloat/leaks to c:\users\task_1616491382\appdata\local\temp\tmpdavo5v.mozrunner\runtests_leaks_tab_pid5384.log
[task 2021-03-23T10:18:03.394Z] 10:18:03     INFO - GECKO(5796) | [5384, Main Thread] WARNING: XPCOM_MEM_BLOAT_LOG is set, disabling native allocations.: file /builds/worker/checkouts/gecko/tools/profiler/core/platform.cpp:254
[task 2021-03-23T10:18:05.249Z] 10:18:05     INFO - GECKO(5796) | [Parent 5300: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 10 (fbd2000) [pid = 5300] [serial = 18] [outer = 0] [url = about:blank]
[task 2021-03-23T10:18:05.648Z] 10:18:05     INFO - GECKO(5796) | Completed ShutdownLeaks collections in process 5300
[task 2021-03-23T10:18:05.648Z] 10:18:05     INFO - TEST-START | Shutdown```