Bug: Intermittent browser/components/privatebrowsing/test/browser/browser_privatebrowsing_history_shift_click.js | Test timed out -
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2021-06-02 00:45:22+00:00
Resolved: 2021-07-06 17:01:59+00:00

**Filed by:** abutkovits [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=341489661&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/NO0XEb_mQIia742cXLtO_w/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2021-06-02T00:31:47.702Z] 00:31:47     INFO - TEST-START | Shutdown
[task 2021-06-02T00:31:47.702Z] 00:31:47     INFO - Browser Chrome Test Summary
[task 2021-06-02T00:31:47.703Z] 00:31:47     INFO - Passed:  283
[task 2021-06-02T00:31:47.703Z] 00:31:47     INFO - Failed:  1
[task 2021-06-02T00:31:47.704Z] 00:31:47     INFO - Todo:    0
[task 2021-06-02T00:31:47.704Z] 00:31:47     INFO - Mode:    e10s
[task 2021-06-02T00:31:47.705Z] 00:31:47     INFO - *** End BrowserChrome Test Results ***
[task 2021-06-02T00:31:47.764Z] 00:31:47     INFO - GECKO(10933) | [Child 11017, Main Thread] WARNING: '!CanSend() || !mManager || !mManager->CanSend()', file /builds/worker/checkouts/gecko/dom/ipc/jsactor/JSWindowActorChild.cpp:40
[task 2021-06-02T00:31:47.773Z] 00:31:47     INFO - GECKO(10933) | [Child 11017, Main Thread] WARNING: '!CanSend() || !mManager || !mManager->CanSend()', file /builds/worker/checkouts/gecko/dom/ipc/jsactor/JSWindowActorChild.cpp:40
[task 2021-06-02T00:31:47.780Z] 00:31:47     INFO - GECKO(10933) | [Child 11017, Main Thread] WARNING: '!CanSend() || !mManager || !mManager->CanSend()', file /builds/worker/checkouts/gecko/dom/ipc/jsactor/JSWindowActorChild.cpp:40
[task 2021-06-02T00:31:47.796Z] 00:31:47     INFO - GECKO(10933) | [Child 11017, Main Thread] WARNING: '!CanSend() || !mManager || !mManager->CanSend()', file /builds/worker/checkouts/gecko/dom/ipc/jsactor/JSWindowActorChild.cpp:40
[task 2021-06-02T00:31:47.803Z] 00:31:47     INFO - GECKO(10933) | [Child 11017, Main Thread] WARNING: '!CanSend() || !mManager || !mManager->CanSend()', file /builds/worker/checkouts/gecko/dom/ipc/jsactor/JSWindowActorChild.cpp:40
[task 2021-06-02T00:31:47.806Z] 00:31:47     INFO - GECKO(10933) | [Child 11017, Main Thread] WARNING: '!CanSend() || !mManager || !mManager->CanSend()', file /builds/worker/checkouts/gecko/dom/ipc/jsactor/JSWindowActorChild.cpp:40
[task 2021-06-02T00:31:47.821Z] 00:31:47     INFO - GECKO(10933) | [Child 11017: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7fd698195400 == 3 [pid = 11017] [id = 0] [url = moz-extension://8c33f7f8-6528-4362-b3b4-c5a490878806/_generated_background_page.html]
[task 2021-06-02T00:31:47.827Z] 00:31:47     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7feabc480800 == 4 [pid = 10933] [id = 1] [url = chrome://extensions/content/dummy.xhtml]
[task 2021-06-02T00:31:47.831Z] 00:31:47     INFO - GECKO(10933) | [Child 11017: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7fd6916c8800 == 2 [pid = 11017] [id = 4] [url = moz-extension://8968b0e2-c21c-49e6-9744-741c3ee26677/_generated_background_page.html]
[task 2021-06-02T00:31:47.832Z] 00:31:47     INFO - GECKO(10933) | [Child 11017: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7fd69819e400 == 1 [pid = 11017] [id = 3] [url = moz-extension://948d1c67-9391-43c6-8484-eb1581ca2c17/_generated_background_page.html]
[task 2021-06-02T00:31:47.832Z] 00:31:47     INFO - GECKO(10933) | [Child 11017: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7fd69819ac00 == 0 [pid = 11017] [id = 1] [url = moz-extension://835e630b-63a6-45ad-90a6-15730deb8188/_generated_background_page.html]
[task 2021-06-02T00:31:47.929Z] 00:31:47     INFO - GECKO(10933) | [Parent 10933, Main Thread] WARNING: '!mIMContext', file /builds/worker/checkouts/gecko/widget/gtk/nsWindow.cpp:7996
[task 2021-06-02T00:31:48.011Z] 00:31:48     INFO - GECKO(10933) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-06-02T00:31:48.014Z] 00:31:48     INFO - GECKO(10933) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-06-02T00:31:48.016Z] 00:31:48     INFO - GECKO(10933) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-06-02T00:31:48.167Z] 00:31:48     INFO - GECKO(10933) | [2021-06-02T00:31:48Z WARN  xulstore::persist] tried to remove key that isn't in the store
[task 2021-06-02T00:31:48.168Z] 00:31:48     INFO - GECKO(10933) | [2021-06-02T00:31:48Z WARN  xulstore::persist] tried to remove key that isn't in the store
[task 2021-06-02T00:31:48.200Z] 00:31:48     INFO - GECKO(10933) | [Child 11017: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 7 (7fd69817f580) [pid = 11017] [serial = 1] [outer = 0] [url = moz-extension://8c33f7f8-6528-4362-b3b4-c5a490878806/_generated_background_page.html]
[task 2021-06-02T00:31:48.202Z] 00:31:48     INFO - GECKO(10933) | [Child 11017: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 6 (7fd69817f900) [pid = 11017] [serial = 3] [outer = 0] [url = moz-extension://835e630b-63a6-45ad-90a6-15730deb8188/_generated_background_page.html]
[task 2021-06-02T00:31:48.204Z] 00:31:48     INFO - GECKO(10933) | [Child 11017: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 5 (7fd69817fc80) [pid = 11017] [serial = 7] [outer = 0] [url = moz-extension://948d1c67-9391-43c6-8484-eb1581ca2c17/_generated_background_page.html]
[task 2021-06-02T00:31:48.206Z] 00:31:48     INFO - GECKO(10933) | [Child 11017: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 4 (7fd69817fe40) [pid = 11017] [serial = 9] [outer = 0] [url = moz-extension://8968b0e2-c21c-49e6-9744-741c3ee26677/_generated_background_page.html]
[task 2021-06-02T00:31:48.208Z] 00:31:48     INFO - GECKO(10933) | [Child 11017: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 3 (7fd690c8cc00) [pid = 11017] [serial = 15] [outer = 0] [url = moz-extension://8968b0e2-c21c-49e6-9744-741c3ee26677/_generated_background_page.html]
[task 2021-06-02T00:31:48.209Z] 00:31:48     INFO - GECKO(10933) | [Child 11017: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (7fd690c8a400) [pid = 11017] [serial = 14] [outer = 0] [url = moz-extension://948d1c67-9391-43c6-8484-eb1581ca2c17/_generated_background_page.html]
[task 2021-06-02T00:31:48.211Z] 00:31:48     INFO - GECKO(10933) | [Child 11017: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (7fd690c84800) [pid = 11017] [serial = 12] [outer = 0] [url = moz-extension://835e630b-63a6-45ad-90a6-15730deb8188/_generated_background_page.html]
[task 2021-06-02T00:31:48.212Z] 00:31:48     INFO - GECKO(10933) | [Child 11017: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (7fd6916ce000) [pid = 11017] [serial = 11] [outer = 0] [url = moz-extension://8c33f7f8-6528-4362-b3b4-c5a490878806/_generated_background_page.html]
[task 2021-06-02T00:31:48.215Z] 00:31:48     INFO - GECKO(10933) | [Child 11017, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp:3357
[task 2021-06-02T00:31:48.234Z] 00:31:48     INFO - GECKO(10933) | [Child 11017, Main Thread] WARNING: NS_ENSURE_TRUE(Preferences::InitStaticMembers()) failed: file /builds/worker/checkouts/gecko/modules/libpref/Preferences.cpp:4442
[task 2021-06-02T00:31:48.580Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7feab72b6000 == 3 [pid = 10933] [id = 4] [url = chrome://mochikit/content/browser-harness.xhtml]
[task 2021-06-02T00:31:48.582Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7feabb763000 == 2 [pid = 10933] [id = 2] [url = about:blank]
[task 2021-06-02T00:31:48.623Z] 00:31:48     INFO - GECKO(10933) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-06-02T00:31:48.628Z] 00:31:48     INFO - GECKO(10933) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-06-02T00:31:48.633Z] 00:31:48     INFO - GECKO(10933) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-06-02T00:31:48.634Z] 00:31:48     INFO - GECKO(10933) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-06-02T00:31:48.641Z] 00:31:48     INFO - GECKO(10933) | [Child 10995: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7f591acce800 == 0 [pid = 10995] [id = 37] [url = about:blank]
[task 2021-06-02T00:31:48.655Z] 00:31:48     INFO - GECKO(10933) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-06-02T00:31:48.655Z] 00:31:48     INFO - GECKO(10933) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-06-02T00:31:48.659Z] 00:31:48     INFO - GECKO(10933) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-06-02T00:31:48.660Z] 00:31:48     INFO - GECKO(10933) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-06-02T00:31:48.746Z] 00:31:48     INFO - GECKO(10933) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-06-02T00:31:48.804Z] 00:31:48     INFO - GECKO(10933) | [Child 12288, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp:3357
[task 2021-06-02T00:31:48.808Z] 00:31:48     INFO - GECKO(10933) | [Child 11090, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp:3357
[task 2021-06-02T00:31:48.809Z] 00:31:48     INFO - GECKO(10933) | [Child 12235, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp:3357
[task 2021-06-02T00:31:48.818Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: idb: '0.000002s: starting', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.818Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: idb: '0.000072s: Live database entry removed', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.818Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: idb: '0.000082s: gLiveDatabaseHashtable entry removed', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.818Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: idb: '0.000170s: Live database entry removed', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.818Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: idb: '0.000178s: gLiveDatabaseHashtable entry removed', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.818Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: cache: '0.000197s: starting', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.818Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: sdb: '0.000206s: starting', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.818Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: ls: '0.000213s: starting', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.820Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: idb: '0.007208s: Live database entry removed', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.821Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: idb: '0.007231s: gLiveDatabaseHashtable entry removed', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.826Z] 00:31:48     INFO - GECKO(10933) | [Child 12262, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp:3357
[task 2021-06-02T00:31:48.839Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: idb: '0.025971s: Live database entry removed', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.841Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: idb: '0.026037s: Live database entry removed', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.842Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: idb: '0.026046s: gLiveDatabaseHashtable entry removed', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.843Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: idb: '0.026068s: completed', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.844Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: cache: '0.026110s: completed', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.845Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: sdb: '0.026118s: completed', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.846Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933, IPDL Background] WARNING: ls: '0.026126s: completed', file /builds/worker/checkouts/gecko/dom/quota/ActorsParent.cpp:3691
[task 2021-06-02T00:31:48.887Z] 00:31:48     INFO - GECKO(10933) | [Child 11090, Main Thread] WARNING: NS_ENSURE_TRUE(Preferences::InitStaticMembers()) failed: file /builds/worker/checkouts/gecko/modules/libpref/Preferences.cpp:4442
[task 2021-06-02T00:31:48.889Z] 00:31:48     INFO - GECKO(10933) | [Child 12235, Main Thread] WARNING: NS_ENSURE_TRUE(Preferences::InitStaticMembers()) failed: file /builds/worker/checkouts/gecko/modules/libpref/Preferences.cpp:4442
[task 2021-06-02T00:31:48.900Z] 00:31:48     INFO - GECKO(10933) | [Child 10995: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (7f5937f64c80) [pid = 10995] [serial = 97] [outer = 0] [url = about:blank]
[task 2021-06-02T00:31:48.904Z] 00:31:48     INFO - GECKO(10933) | [Child 10995: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (7f591acd0400) [pid = 10995] [serial = 98] [outer = 0] [url = about:blank]
[task 2021-06-02T00:31:48.907Z] 00:31:48     INFO - GECKO(10933) | [Child 10995, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp:3357
[task 2021-06-02T00:31:48.911Z] 00:31:48     INFO - GECKO(10933) | [Child 12288, Main Thread] WARNING: NS_ENSURE_TRUE(Preferences::InitStaticMembers()) failed: file /builds/worker/checkouts/gecko/modules/libpref/Preferences.cpp:4442
[task 2021-06-02T00:31:48.912Z] 00:31:48     INFO - GECKO(10933) | [Child 12262, Main Thread] WARNING: NS_ENSURE_TRUE(Preferences::InitStaticMembers()) failed: file /builds/worker/checkouts/gecko/modules/libpref/Preferences.cpp:4442
[task 2021-06-02T00:31:48.939Z] 00:31:48     INFO - GECKO(10933) | [Child 10995, Main Thread] WARNING: NS_ENSURE_TRUE(Preferences::InitStaticMembers()) failed: file /builds/worker/checkouts/gecko/modules/libpref/Preferences.cpp:4442
[task 2021-06-02T00:31:48.951Z] 00:31:48     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7feabed59000 == 1 [pid = 10933] [id = 0] [url = chrome://browser/content/browser.xhtml]
[task 2021-06-02T00:31:48.955Z] 00:31:48     INFO - GECKO(10933) | [Child 11077, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp:3357
[task 2021-06-02T00:31:48.983Z] 00:31:48     INFO - GECKO(10933) | [Child 11077, Main Thread] WARNING: NS_ENSURE_TRUE(Preferences::InitStaticMembers()) failed: file /builds/worker/checkouts/gecko/modules/libpref/Preferences.cpp:4442
[task 2021-06-02T00:31:49.205Z] 00:31:49     INFO - GECKO(10933) | 1622593909203	Marionette	TRACE	Received observer notification xpcom-will-shutdown
[task 2021-06-02T00:31:49.206Z] 00:31:49     INFO - GECKO(10933) | 1622593909204	Marionette	INFO	Stopped listening on port 2828
[task 2021-06-02T00:31:49.208Z] 00:31:49     INFO - GECKO(10933) | 1622593909205	Marionette	DEBUG	Marionette stopped listening
[task 2021-06-02T00:31:49.346Z] 00:31:49     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7feac20f1000 == 0 [pid = 10933] [id = 3] [url = resource://gre-resources/hiddenWindow.html]
[task 2021-06-02T00:31:50.655Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 13 (7fea938c2900) [pid = 10933] [serial = 230] [outer = 0] [url = chrome://browser/content/browser.xhtml]
[task 2021-06-02T00:31:50.655Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 12 (7fea88331900) [pid = 10933] [serial = 226] [outer = 0] [url = chrome://browser/content/browser.xhtml]
[task 2021-06-02T00:31:50.660Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 11 (7feab17a2800) [pid = 10933] [serial = 231] [outer = 0] [url = about:blank]
[task 2021-06-02T00:31:50.666Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 10 (7fea93758000) [pid = 10933] [serial = 227] [outer = 0] [url = about:blank]
[task 2021-06-02T00:31:50.666Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 9 (7feabed59800) [pid = 10933] [serial = 2] [outer = 0] [url = about:blank]
[task 2021-06-02T00:31:50.666Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 8 (7feac204be40) [pid = 10933] [serial = 1] [outer = 0] [url = chrome://browser/content/browser.xhtml]
[task 2021-06-02T00:31:50.666Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 7 (7feab52e3040) [pid = 10933] [serial = 10] [outer = 0] [url = chrome://mochikit/content/browser-harness.xhtml]
[task 2021-06-02T00:31:50.666Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 6 (7feab72b8400) [pid = 10933] [serial = 11] [outer = 0] [url = about:blank]
[task 2021-06-02T00:31:50.667Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 5 (7fea7e811400) [pid = 10933] [serial = 458] [outer = 0] [url = about:blank]
[task 2021-06-02T00:31:50.670Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 4 (7feabd21de40) [pid = 10933] [serial = 5] [outer = 0] [url = about:blank]
[task 2021-06-02T00:31:50.670Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 3 (7feabd21d580) [pid = 10933] [serial = 3] [outer = 0] [url = chrome://extensions/content/dummy.xhtml]
[task 2021-06-02T00:31:50.670Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (7feabbc2c400) [pid = 10933] [serial = 4] [outer = 0] [url = chrome://extensions/content/dummy.xhtml]
[task 2021-06-02T00:31:50.670Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (7feabaf3c740) [pid = 10933] [serial = 7] [outer = 0] [url = resource://gre-resources/hiddenWindow.html]
[task 2021-06-02T00:31:50.676Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (7feab7914400) [pid = 10933] [serial = 9] [outer = 0] [url = resource://gre-resources/hiddenWindow.html]
[task 2021-06-02T00:31:50.696Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp:3357
[task 2021-06-02T00:31:50.758Z] 00:31:50     INFO - GECKO(10933) | [Parent 10933, Main Thread] WARNING: NS_ENSURE_TRUE(Preferences::InitStaticMembers()) failed: file /builds/worker/checkouts/gecko/modules/libpref/Preferences.cpp:4442
[task 2021-06-02T00:31:50.783Z] 00:31:50     INFO - TEST-INFO | Main app process: exit 0
[task 2021-06-02T00:31:50.783Z] 00:31:50     INFO - TEST-INFO | Confirming we saw 477 DOCSHELL created and 477 destroyed log strings.
[task 2021-06-02T00:31:50.783Z] 00:31:50     INFO - TEST-INFO | Confirming we saw 1181 DOMWINDOW created and 1181 destroyed log strings.
[task 2021-06-02T00:31:50.783Z] 00:31:50    ERROR - TEST-UNEXPECTED-FAIL | browser/components/privatebrowsing/test/browser/browser_privatebrowsing_history_shift_click.js | leaked 2 window(s) until shutdown [url = about:blank]
[task 2021-06-02T00:31:50.784Z] 00:31:50    ERROR - TEST-UNEXPECTED-FAIL | browser/components/privatebrowsing/test/browser/browser_privatebrowsing_history_shift_click.js | leaked 2 window(s) until shutdown [url = chrome://browser
```