Bug: Intermittent browser/components/preferences/tests/browser_browser_languages_subdialog.js | leaked 2 window(s) until shutdown [url = chrome://browser/content/preferences/dialogs/browserLanguages.xhtml]
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2020-06-16 09:38:03+00:00
Resolved: 2020-09-08 17:04:41+00:00

**Filed by:** abutkovits [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer.html#?job_id=306462510&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/f-ZBs2VOTRKPObBTsDxz8A/runs/0/artifacts/public/logs/live_backing.log

---

[task 2020-06-16T08:54:37.278Z] 08:54:37     INFO - TEST-START | Shutdown
[task 2020-06-16T08:54:37.278Z] 08:54:37     INFO - Browser Chrome Test Summary
[task 2020-06-16T08:54:37.278Z] 08:54:37     INFO - Passed:  5399
[task 2020-06-16T08:54:37.279Z] 08:54:37     INFO - Failed:  0
[task 2020-06-16T08:54:37.279Z] 08:54:37     INFO - Todo:    1
[task 2020-06-16T08:54:37.279Z] 08:54:37     INFO - Mode:    e10s
[task 2020-06-16T08:54:37.279Z] 08:54:37     INFO - *** End BrowserChrome Test Results ***
[task 2020-06-16T08:54:37.353Z] 08:54:37     INFO - GECKO(1442) | [Child 1443: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x125004800 == 3 [pid = 1443] [id = {3aca9736-744a-5f4f-bda1-4a26c173869d}] [url = moz-extension://70a1d29b-cdf8-5e44-bd64-25d9d5d2c0bf/_generated_background_page.html]
[task 2020-06-16T08:54:37.353Z] 08:54:37     INFO - GECKO(1442) | [Child 1443: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x109c16400 == 2 [pid = 1443] [id = {1b8070dc-cd98-6242-85e5-c748d2646cb2}] [url = moz-extension://770e350c-36ed-3640-8fd6-c2448c8bfd25/_generated_background_page.html]
[task 2020-06-16T08:54:37.417Z] 08:54:37     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x12731f400 == 4 [pid = 1442] [id = {b4cf904e-3011-f247-b27f-6c3bbdae6354}] [url = chrome://extensions/content/dummy.xhtml]
[task 2020-06-16T08:54:37.618Z] 08:54:37     INFO - GECKO(1442) | [Child 1443, Main Thread] WARNING: nsAppShell::Exit() called redundantly: file /builds/worker/checkouts/gecko/widget/cocoa/nsAppShell.mm, line 714
[task 2020-06-16T08:54:37.619Z] 08:54:37     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:37.619Z] 08:54:37     INFO - GECKO(1442) | [Child 1443: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x11dc11400 == 1 [pid = 1443] [id = {b6506fed-1dfe-254a-b6fb-e97889153cce}] [url = moz-extension://faa7782d-2c5b-1e4b-8d5c-3d97e7666aa6/_generated_background_page.html]
[task 2020-06-16T08:54:37.619Z] 08:54:37     INFO - GECKO(1442) | [Child 1443: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x125006c00 == 0 [pid = 1443] [id = {38ecf65d-ac29-3948-a1f7-b0c6521d3577}] [url = moz-extension://0019030f-ab64-b44c-958f-95c8e02040eb/_generated_background_page.html]
[task 2020-06-16T08:54:37.667Z] 08:54:37     INFO - GECKO(1442) | [Parent 1442, Main Thread] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80040111 (NS_ERROR_NOT_AVAILABLE): file /builds/worker/checkouts/gecko/netwerk/cache/nsApplicationCacheService.cpp, line 161
[task 2020-06-16T08:54:37.676Z] 08:54:37     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x127997800 == 3 [pid = 1442] [id = {936267dc-7ada-6340-8413-a3f951615aff}] [url = chrome://mochikit/content/browser-harness.xhtml]
[task 2020-06-16T08:54:37.676Z] 08:54:37     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x1295b2000 == 2 [pid = 1442] [id = {93319f84-e6df-8449-8fd8-dac99f133e61}] [url = about:blank]
[task 2020-06-16T08:54:37.678Z] 08:54:37     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x122645400 == 1 [pid = 1442] [id = {477c8036-70fa-6f4f-bb77-3d9295956259}] [url = chrome://browser/content/hiddenWindowMac.xhtml]
[task 2020-06-16T08:54:37.754Z] 08:54:37     INFO - GECKO(1442) | [Child 1443: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 7 (0x10930b8c0) [pid = 1443] [serial = 5] [outer = 0x0] [url = moz-extension://770e350c-36ed-3640-8fd6-c2448c8bfd25/_generated_background_page.html]
[task 2020-06-16T08:54:37.754Z] 08:54:37     INFO - GECKO(1442) | [Child 1443: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 6 (0x10930ba90) [pid = 1443] [serial = 7] [outer = 0x0] [url = moz-extension://70a1d29b-cdf8-5e44-bd64-25d9d5d2c0bf/_generated_background_page.html]
[task 2020-06-16T08:54:37.754Z] 08:54:37     INFO - GECKO(1442) | [Child 1443: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 5 (0x10930bc60) [pid = 1443] [serial = 9] [outer = 0x0] [url = moz-extension://0019030f-ab64-b44c-958f-95c8e02040eb/_generated_background_page.html]
[task 2020-06-16T08:54:37.756Z] 08:54:37     INFO - GECKO(1442) | [Child 1443: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 4 (0x10930b6f0) [pid = 1443] [serial = 3] [outer = 0x0] [url = moz-extension://faa7782d-2c5b-1e4b-8d5c-3d97e7666aa6/_generated_background_page.html]
[task 2020-06-16T08:54:37.756Z] 08:54:37     INFO - GECKO(1442) | [Child 1443: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 3 (0x1256a9800) [pid = 1443] [serial = 14] [outer = 0x0] [url = moz-extension://70a1d29b-cdf8-5e44-bd64-25d9d5d2c0bf/_generated_background_page.html]
[task 2020-06-16T08:54:37.756Z] 08:54:37     INFO - GECKO(1442) | [Child 1443: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (0x1256ab400) [pid = 1443] [serial = 15] [outer = 0x0] [url = moz-extension://0019030f-ab64-b44c-958f-95c8e02040eb/_generated_background_page.html]
[task 2020-06-16T08:54:37.758Z] 08:54:37     INFO - GECKO(1442) | [Child 1443: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (0x1256a5800) [pid = 1443] [serial = 12] [outer = 0x0] [url = moz-extension://faa7782d-2c5b-1e4b-8d5c-3d97e7666aa6/_generated_background_page.html]
[task 2020-06-16T08:54:37.758Z] 08:54:37     INFO - GECKO(1442) | [Child 1443: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (0x1256a7800) [pid = 1443] [serial = 13] [outer = 0x0] [url = moz-extension://770e350c-36ed-3640-8fd6-c2448c8bfd25/_generated_background_page.html]
[task 2020-06-16T08:54:37.758Z] 08:54:37     INFO - GECKO(1442) | [Child 1443, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp, line 3359
[task 2020-06-16T08:54:38.370Z] 08:54:38     INFO - GECKO(1442) | [2020-06-16T08:54:38Z WARN  xulstore::persist] tried to remove key that isn't in the store
[task 2020-06-16T08:54:38.374Z] 08:54:38     INFO - GECKO(1442) | [2020-06-16T08:54:38Z WARN  xulstore::persist] tried to remove key that isn't in the store
[task 2020-06-16T08:54:38.978Z] 08:54:38     INFO - GECKO(1442) | [Child 1444, Main Thread] WARNING: nsAppShell::Exit() called redundantly: file /builds/worker/checkouts/gecko/widget/cocoa/nsAppShell.mm, line 714
[task 2020-06-16T08:54:38.978Z] 08:54:38     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:38.978Z] 08:54:38     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:38.978Z] 08:54:38     INFO - GECKO(1442) | [Child 1445, Main Thread] WARNING: nsAppShell::Exit() called redundantly: file /builds/worker/checkouts/gecko/widget/cocoa/nsAppShell.mm, line 714
[task 2020-06-16T08:54:39.032Z] 08:54:39     INFO - GECKO(1442) | [Child 1444, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp, line 3359
[task 2020-06-16T08:54:39.032Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.032Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.032Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.032Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.033Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.033Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.033Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.033Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.035Z] 08:54:39     INFO - GECKO(1442) | [Child 1445, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp, line 3359
[task 2020-06-16T08:54:39.116Z] 08:54:39     INFO - GECKO(1442) | [Child 1446, Main Thread] WARNING: nsAppShell::Exit() called redundantly: file /builds/worker/checkouts/gecko/widget/cocoa/nsAppShell.mm, line 714
[task 2020-06-16T08:54:39.116Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.116Z] 08:54:39     INFO - GECKO(1442) | [Child 1447, Main Thread] WARNING: nsAppShell::Exit() called redundantly: file /builds/worker/checkouts/gecko/widget/cocoa/nsAppShell.mm, line 714
[task 2020-06-16T08:54:39.116Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.116Z] 08:54:39     INFO - GECKO(1442) | [Child 1448, Main Thread] WARNING: nsAppShell::Exit() called redundantly: file /builds/worker/checkouts/gecko/widget/cocoa/nsAppShell.mm, line 714
[task 2020-06-16T08:54:39.116Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.116Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.116Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.116Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.129Z] 08:54:39     INFO - GECKO(1442) | [Child 1446: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x14d6a3c00 == 0 [pid = 1446] [id = {ef1078c5-3837-f44d-98b1-f067750fc5bb}] [url = about:blank]
[task 2020-06-16T08:54:39.129Z] 08:54:39     INFO - GECKO(1442) | [Child 1450, Main Thread] WARNING: nsAppShell::Exit() called redundantly: file /builds/worker/checkouts/gecko/widget/cocoa/nsAppShell.mm, line 714
[task 2020-06-16T08:54:39.165Z] 08:54:39     INFO - GECKO(1442) | [Child 1449, Main Thread] WARNING: nsAppShell::Exit() called redundantly: file /builds/worker/checkouts/gecko/widget/cocoa/nsAppShell.mm, line 714
[task 2020-06-16T08:54:39.165Z] 08:54:39     INFO - GECKO(1442) | [Child 1448, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp, line 3359
[task 2020-06-16T08:54:39.165Z] 08:54:39     INFO - GECKO(1442) | [Child 1447, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp, line 3359
[task 2020-06-16T08:54:39.166Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.166Z] 08:54:39     INFO - GECKO(1442) | [Child 1451, Main Thread] WARNING: nsAppShell::Exit() called redundantly: file /builds/worker/checkouts/gecko/widget/cocoa/nsAppShell.mm, line 714
[task 2020-06-16T08:54:39.166Z] 08:54:39     INFO - GECKO(1442) | [Child 1458, Main Thread] WARNING: nsAppShell::Exit() called redundantly: file /builds/worker/checkouts/gecko/widget/cocoa/nsAppShell.mm, line 714
[task 2020-06-16T08:54:39.193Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.193Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.212Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.212Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.212Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.212Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.212Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.212Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.213Z] 08:54:39     INFO - GECKO(1442) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-06-16T08:54:39.216Z] 08:54:39     INFO - GECKO(1442) | [Child 1450, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp, line 3359
[task 2020-06-16T08:54:39.268Z] 08:54:39     INFO - GECKO(1442) | [Child 1446: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (0x13794ea40) [pid = 1446] [serial = 276] [outer = 0x0] [url = about:blank]
[task 2020-06-16T08:54:39.268Z] 08:54:39     INFO - GECKO(1442) | [Child 1446: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (0x14d910800) [pid = 1446] [serial = 278] [outer = 0x0] [url = about:blank]
[task 2020-06-16T08:54:39.269Z] 08:54:39     INFO - GECKO(1442) | [Child 1446, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp, line 3359
[task 2020-06-16T08:54:39.269Z] 08:54:39     INFO - GECKO(1442) | [Child 1458, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp, line 3359
[task 2020-06-16T08:54:39.273Z] 08:54:39     INFO - GECKO(1442) | [Child 1449, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp, line 3359
[task 2020-06-16T08:54:39.351Z] 08:54:39     INFO - GECKO(1442) | [Child 1451, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp, line 3359
[task 2020-06-16T08:54:39.370Z] 08:54:39     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x122650c00 == 0 [pid = 1442] [id = {5e87ec06-9127-8043-9bca-6a87007fcbe5}] [url = chrome://browser/content/browser.xhtml]
[task 2020-06-16T08:54:39.632Z] 08:54:39     INFO - GECKO(1442) | 1592297679592	Marionette	TRACE	Received observer notification xpcom-will-shutdown
[task 2020-06-16T08:54:39.632Z] 08:54:39     INFO - GECKO(1442) | 1592297679592	Marionette	INFO	Stopped listening on port 2828
[task 2020-06-16T08:54:39.632Z] 08:54:39     INFO - GECKO(1442) | 1592297679592	Marionette	DEBUG	Marionette stopped listening
[task 2020-06-16T08:54:39.666Z] 08:54:39     INFO - GECKO(1442) | [Parent 1442, Main Thread] WARNING: nsAppShell::Exit() called redundantly: file /builds/worker/checkouts/gecko/widget/cocoa/nsAppShell.mm, line 714
[task 2020-06-16T08:54:39.704Z] 08:54:39     INFO - GECKO(1442) | [Parent 1442, Main Thread] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80004005 (NS_ERROR_FAILURE): file /builds/worker/checkouts/gecko/js/xpconnect/loader/mozJSComponentLoader.cpp, line 227
[task 2020-06-16T08:54:39.704Z] 08:54:39     INFO - GECKO(1442) | [Parent 1442, Main Thread] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80004005 (NS_ERROR_FAILURE): file /builds/worker/checkouts/gecko/js/xpconnect/loader/mozJSComponentLoader.cpp, line 254
[task 2020-06-16T08:54:41.192Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 13 (0x12ded7480) [pid = 1442] [serial = 57] [outer = 0x0] [url = chrome://browser/content/preferences/dialogs/browserLanguages.xhtml]
[task 2020-06-16T08:54:41.192Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 12 (0x12ded96f0) [pid = 1442] [serial = 52] [outer = 0x0] [url = about:preferences#general]
[task 2020-06-16T08:54:41.216Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 11 (0x1630d8800) [pid = 1442] [serial = 66] [outer = 0x0] [url = chrome://browser/content/preferences/dialogs/browserLanguages.xhtml]
[task 2020-06-16T08:54:41.216Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 10 (0x126a91800) [pid = 1442] [serial = 4] [outer = 0x0] [url = about:blank]
[task 2020-06-16T08:54:41.216Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 9 (0x10deed090) [pid = 1442] [serial = 3] [outer = 0x0] [url = chrome://browser/content/browser.xhtml]
[task 2020-06-16T08:54:41.216Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 8 (0x10a285820) [pid = 1442] [serial = 9] [outer = 0x0] [url = chrome://mochikit/content/browser-harness.xhtml]
[task 2020-06-16T08:54:41.216Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 7 (0x128efa800) [pid = 1442] [serial = 10] [outer = 0x0] [url = about:blank]
[task 2020-06-16T08:54:41.216Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 6 (0x10deefde0) [pid = 1442] [serial = 5] [outer = 0x0] [url = chrome://extensions/content/dummy.xhtml]
[task 2020-06-16T08:54:41.217Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 5 (0x11e520000) [pid = 1442] [serial = 6] [outer = 0x0] [url = chrome://extensions/content/dummy.xhtml]
[task 2020-06-16T08:54:41.217Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 4 (0x10a284260) [pid = 1442] [serial = 7] [outer = 0x0] [url = about:blank]
[task 2020-06-16T08:54:41.217Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 3 (0x12f208000) [pid = 1442] [serial = 2060] [outer = 0x0] [url = about:blank]
[task 2020-06-16T08:54:41.217Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (0x10deeffb0) [pid = 1442] [serial = 1] [outer = 0x0] [url = chrome://browser/content/hiddenWindowMac.xhtml]
[task 2020-06-16T08:54:41.217Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (0x12264b400) [pid = 1442] [serial = 2] [outer = 0x0] [url = about:blank]
[task 2020-06-16T08:54:41.231Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (0x15d084c00) [pid = 1442] [serial = 55] [outer = 0x0] [url = about:preferences#general]
[task 2020-06-16T08:54:41.317Z] 08:54:41     INFO - GECKO(1442) | [Parent 1442, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp, line 3359
[task 2020-06-16T08:54:41.518Z] 08:54:41     INFO - TEST-INFO | Main app process: exit 0
[task 2020-06-16T08:54:41.518Z] 08:54:41     INFO - TEST-INFO | Confirming we saw 974 DOCSHELL created and 974 destroyed log strings.
[task 2020-06-16T08:54:41.518Z] 08:54:41     INFO - TEST-INFO | Confirming we saw 2794 DOMWINDOW created and 2794 destroyed log strings.
[task 2020-06-16T08:54:41.518Z] 08:54:41    ERROR - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_browser_languages_subdialog.js | leaked 2 window(s) until shutdown [url = chrome://browser/content/preferences/dialogs/browserLanguages.xhtml]
[task 2020-06-16T08:54:41.519Z] 08:54:41    ERROR - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_browser_languages_subdialog.js | leaked 2 window(s) until shutdown [url = about:preferences#general]