Bug: Intermittent browser/modules/test/browser/browser_preloading_tab_moving.js | Uncaught exception - [Exception... "(null)"  nsresult: "0x80040111 (NS_ERROR_NOT_AVAILABLE)"  location: "<unknown>"  data: no]
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2021-08-23 16:41:54+00:00
Resolved: 2021-09-21 17:01:54+00:00

**Filed by:** apavel [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=349261366&repo=mozilla-esr78
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/WM_Q4jtKQpWtiZvtWka5AQ/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2021-08-23T15:57:32.377Z] 15:57:32     INFO - TEST-START | browser/modules/test/browser/browser_preloading_tab_moving.js
[task 2021-08-23T15:57:32.397Z] 15:57:32     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 015A7800 == 2 [pid = 4148] [id = {da7971c3-19e6-49ff-8ebc-aa30f74a0e78}]
[task 2021-08-23T15:57:32.397Z] 15:57:32     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 5 (015EDBD0) [pid = 4148] [serial = 64] [outer = 00000000]
[task 2021-08-23T15:57:32.397Z] 15:57:32     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 6 (015AFC00) [pid = 4148] [serial = 65] [outer = 015EDBD0]
[task 2021-08-23T15:57:32.397Z] 15:57:32     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 27A90400 == 22 [pid = 4916] [id = {130222de-66b0-4728-b37a-f3e014dbf565}]
[task 2021-08-23T15:57:32.397Z] 15:57:32     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 46 (1D0A9670) [pid = 4916] [serial = 205] [outer = 00000000]
[task 2021-08-23T15:57:32.397Z] 15:57:32     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 47 (27DD0400) [pid = 4916] [serial = 206] [outer = 1D0A9670]
[task 2021-08-23T15:57:32.438Z] 15:57:32     INFO - GECKO(4720) | [Parent 4916, Main Thread] WARNING: NS_ENSURE_TRUE(rootFrame) failed: file /builds/worker/checkouts/gecko/dom/base/nsGlobalWindowOuter.cpp, line 4260
[task 2021-08-23T15:57:32.441Z] 15:57:32     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 7 (09A09000) [pid = 4148] [serial = 66] [outer = 015EDBD0]
[task 2021-08-23T15:57:32.648Z] 15:57:32     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 2F834C00 == 23 [pid = 4916] [id = {122a3504-4941-4087-83c3-486954220d55}]
[task 2021-08-23T15:57:32.648Z] 15:57:32     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 48 (1D0A9DE0) [pid = 4916] [serial = 207] [outer = 00000000]
[task 2021-08-23T15:57:32.715Z] 15:57:32     INFO - GECKO(4720) | [Child 2712: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 090C9400 == 4 [pid = 2712] [id = {60f376da-0bca-48f2-a64e-0eebe52bbe55}]
[task 2021-08-23T15:57:32.715Z] 15:57:32     INFO - GECKO(4720) | [Child 2712: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 21 (013F0230) [pid = 2712] [serial = 184] [outer = 00000000]
[task 2021-08-23T15:57:32.715Z] 15:57:32     INFO - GECKO(4720) | [Child 2712: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 22 (090D1000) [pid = 2712] [serial = 185] [outer = 013F0230]
[task 2021-08-23T15:57:32.790Z] 15:57:32     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 49 (28896800) [pid = 4916] [serial = 208] [outer = 1D0A9DE0]
[task 2021-08-23T15:57:32.905Z] 15:57:32     INFO - GECKO(4720) | [Parent 4916, Main Thread] WARNING: NS_ENSURE_TRUE(mPresShell) failed: file /builds/worker/checkouts/gecko/layout/generic/nsFrameSelection.cpp, line 1616
[task 2021-08-23T15:57:32.920Z] 15:57:32     INFO - GECKO(4720) | [Child 2712: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 23 (0BBD7000) [pid = 2712] [serial = 186] [outer = 013F0230]
[task 2021-08-23T15:57:33.215Z] 15:57:33     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 09A06800 == 3 [pid = 4148] [id = {456a6ce9-189d-4451-8c55-41cd9cfc4732}]
[task 2021-08-23T15:57:33.215Z] 15:57:33     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 8 (015EEAB0) [pid = 4148] [serial = 67] [outer = 00000000]
[task 2021-08-23T15:57:33.215Z] 15:57:33     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 9 (09A0FC00) [pid = 4148] [serial = 68] [outer = 015EEAB0]
[task 2021-08-23T15:57:33.730Z] 15:57:33     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 09A07000 == 4 [pid = 4148] [id = {c402e3a1-45c2-42e0-8674-d0d8213eabcd}]
[task 2021-08-23T15:57:33.730Z] 15:57:33     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 10 (015EECD0) [pid = 4148] [serial = 69] [outer = 00000000]
[task 2021-08-23T15:57:33.730Z] 15:57:33     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 11 (09A0A800) [pid = 4148] [serial = 70] [outer = 015EECD0]
[task 2021-08-23T15:57:33.871Z] 15:57:33     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 12 (09A0D400) [pid = 4148] [serial = 71] [outer = 015EECD0]
[task 2021-08-23T15:57:33.891Z] 15:57:33     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 09A0F400 == 5 [pid = 4148] [id = {6b1928b6-1692-428b-b3fc-fcb66f426165}]
[task 2021-08-23T15:57:33.891Z] 15:57:33     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 13 (0DED8020) [pid = 4148] [serial = 72] [outer = 00000000]
[task 2021-08-23T15:57:33.891Z] 15:57:33     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 14 (09AB1800) [pid = 4148] [serial = 73] [outer = 0DED8020]
[task 2021-08-23T15:57:33.930Z] 15:57:33     INFO - GECKO(4720) | [Child 4148, Main Thread] WARNING: NS_ENSURE_TRUE(request) failed: file /builds/worker/checkouts/gecko/netwerk/base/nsLoadGroup.cpp, line 595
[task 2021-08-23T15:57:33.930Z] 15:57:33     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 09AB5800 == 6 [pid = 4148] [id = {0f203e69-95e9-46eb-a3d8-f97f77dae7d5}]
[task 2021-08-23T15:57:33.930Z] 15:57:33     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 15 (0DED8130) [pid = 4148] [serial = 74] [outer = 00000000]
[task 2021-08-23T15:57:33.930Z] 15:57:33     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 16 (09AB7800) [pid = 4148] [serial = 75] [outer = 0DED8130]
[task 2021-08-23T15:57:33.937Z] 15:57:33     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 25A56C00 == 24 [pid = 4916] [id = {78017f52-3407-4d1f-ba32-eaabd6a86813}]
[task 2021-08-23T15:57:33.937Z] 15:57:33     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 50 (1DF97BC0) [pid = 4916] [serial = 209] [outer = 00000000]
[task 2021-08-23T15:57:33.937Z] 15:57:33     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 51 (2817E000) [pid = 4916] [serial = 210] [outer = 1DF97BC0]
[task 2021-08-23T15:57:33.992Z] 15:57:33     INFO - GECKO(4720) | [Child 4148, Main Thread] WARNING: '!mCanSend || !mManager || !mManager->CanSend()', file /builds/worker/checkouts/gecko/dom/ipc/JSWindowActorChild.cpp, line 78
[task 2021-08-23T15:57:34.067Z] 15:57:34     INFO - GECKO(4720) | [Parent 4916, Main Thread] WARNING: NS_ENSURE_TRUE(rootFrame) failed: file /builds/worker/checkouts/gecko/dom/base/nsGlobalWindowOuter.cpp, line 4260
[task 2021-08-23T15:57:34.074Z] 15:57:34     INFO - GECKO(4720) | [Child 4148: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 17 (09ABB000) [pid = 4148] [serial = 76] [outer = 0DED8130]
[task 2021-08-23T15:57:34.269Z] 15:57:34     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 2E35EC00 == 25 [pid = 4916] [id = {7dab3137-b6d0-49b6-9a2d-1293c05c138e}]
[task 2021-08-23T15:57:34.269Z] 15:57:34     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 52 (205B0DE0) [pid = 4916] [serial = 211] [outer = 00000000]
[task 2021-08-23T15:57:34.344Z] 15:57:34     INFO - GECKO(4720) | [Child 2712: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 0BBCF800 == 5 [pid = 2712] [id = {5a78242d-3906-4922-820a-58934f94ec15}]
[task 2021-08-23T15:57:34.344Z] 15:57:34     INFO - GECKO(4720) | [Child 2712: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 24 (013F0340) [pid = 2712] [serial = 187] [outer = 00000000]
[task 2021-08-23T15:57:34.344Z] 15:57:34     INFO - GECKO(4720) | [Child 2712: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 25 (0BBD3400) [pid = 2712] [serial = 188] [outer = 013F0340]
[task 2021-08-23T15:57:34.499Z] 15:57:34     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 53 (262EA000) [pid = 4916] [serial = 212] [outer = 205B0DE0]
[task 2021-08-23T15:57:34.682Z] 15:57:34     INFO - GECKO(4720) | [Parent 4916, Main Thread] WARNING: NS_ENSURE_TRUE(mPresShell) failed: file /builds/worker/checkouts/gecko/layout/generic/nsFrameSelection.cpp, line 1616
[task 2021-08-23T15:57:34.842Z] 15:57:34     INFO - GECKO(4720) | [Child 2712: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 26 (0CB9F400) [pid = 2712] [serial = 189] [outer = 013F0340]
[task 2021-08-23T15:57:35.062Z] 15:57:35     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 52 (29640400) [pid = 4916] [serial = 156] [outer = 00000000] [url = about:blank]
[task 2021-08-23T15:57:35.062Z] 15:57:35     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 51 (2817F800) [pid = 4916] [serial = 178] [outer = 00000000] [url = about:blank]
[task 2021-08-23T15:57:35.062Z] 15:57:35     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 50 (1DCA9800) [pid = 4916] [serial = 8] [outer = 00000000] [url = about:blank]
[task 2021-08-23T15:57:35.065Z] 15:57:35     INFO - GECKO(4720) | [Parent 4916: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 49 (262E8800) [pid = 4916] [serial = 198] [outer = 00000000] [url = about:blank]
[task 2021-08-23T15:57:35.420Z] 15:57:35     INFO - GECKO(4720) | [Child 5364: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 08EBD000 == 2 [pid = 5364] [id = {aee4b60c-0873-42db-aeb7-96bee84427b7}]
[task 2021-08-23T15:57:35.420Z] 15:57:35     INFO - GECKO(4720) | [Child 5364: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 10 (00BF1340) [pid = 5364] [serial = 191] [outer = 00000000]
[task 2021-08-23T15:57:35.420Z] 15:57:35     INFO - GECKO(4720) | [Child 5364: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 11 (0CE08C00) [pid = 5364] [serial = 192] [outer = 00BF1340]
[task 2021-08-23T15:57:35.835Z] 15:57:35     INFO - GECKO(4720) | [Child 5364: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 10 (069E9400) [pid = 5364] [serial = 181] [outer = 00000000] [url = about:blank]
[task 2021-08-23T15:57:35.835Z] 15:57:35     INFO - GECKO(4720) | [Child 5364: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 9 (0CE0EC00) [pid = 5364] [serial = 185] [outer = 00000000] [url = about:blank]
[task 2021-08-23T15:57:35.835Z] 15:57:35     INFO - GECKO(4720) | [Child 5364: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 8 (08EBC000) [pid = 5364] [serial = 184] [outer = 00000000] [url = about:blank]
[task 2021-08-23T15:57:35.836Z] 15:57:35     INFO - GECKO(4720) | [Child 5364: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 7 (0D419400) [pid = 5364] [serial = 186] [outer = 00000000] [url = http://example.com/]
[task 2021-08-23T15:57:35.836Z] 15:57:35     INFO - GECKO(4720) | [Child 5364: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 6 (08EC4400) [pid = 5364] [serial = 182] [outer = 00000000] [url = about:privatebrowsing]
[task 2021-08-23T15:57:35.836Z] 15:57:35     INFO - GECKO(4720) | [Child 5364: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 069E7C00 == 1 [pid = 5364] [id = {56f58abf-22dc-4cbb-b2d7-ca4c3fe47e65}] [url = http://example.com/mypage]
[task 2021-08-23T15:57:36.159Z] 15:57:36     INFO - GECKO(4720) | [Child 1516: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 18 (071EF400) [pid = 1516] [serial = 155] [outer = 00000000] [url = about:blank]
[task 2021-08-23T15:57:36.159Z] 15:57:36     INFO - GECKO(4720) | [Child 1516: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 17 (094CD400) [pid = 1516] [serial = 153] [outer = 00000000] [url = about:blank]
[task 2021-08-23T15:57:36.160Z] 15:57:36     INFO - GECKO(4720) | [Child 1516: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 16 (094CB800) [pid = 1516] [serial = 156] [outer = 00000000] [url = about:blank]
[task 2021-08-23T15:57:36.160Z] 15:57:36     INFO - GECKO(4720) | [Child 1516: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 15 (094C0000) [pid = 1516] [serial = 158] [outer = 00000000] [url = about:blank]
[task 2021-08-23T15:57:36.160Z] 15:57:36     INFO - GECKO(4720) | [Child 1516: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 14 (094CD800) [pid = 1516] [serial = 161] [outer = 00000000] [url = about:blank]
[task 2021-08-23T15:57:36.161Z] 15:57:36     INFO - GECKO(4720) | [Child 1516: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 13 (0D485000) [pid = 1516] [serial = 162] [outer = 00000000] [url = about:blank]
[task 2021-08-23T15:57:36.161Z] 15:57:36     INFO - GECKO(4720) | [Child 1516: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0C683C00 == 2 [pid = 1516] [id = {b5c6c806-630c-414f-b18a-470f343fd118}] [url = about:blank]
[task 2021-08-23T15:57:36.161Z] 15:57:36     INFO - GECKO(4720) | [Child 1516: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 070D7400 == 1 [pid = 1516] [id = {f1ef22c6-3b7a-467e-b646-35c618acad3c}] [url = about:blank]
[task 2021-08-23T15:57:36.240Z] 15:57:36     INFO - GECKO(4720) | [Child 5364, Main Thread] WARNING: NS_ENSURE_TRUE(request) failed: file /builds/worker/checkouts/gecko/netwerk/base/nsLoadGroup.cpp, line 595
[task 2021-08-23T15:57:36.240Z] 15:57:36     INFO - GECKO(4720) | [Child 6064: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 00FB5C00 == 1 [pid = 6064] [id = {376508df-3d66-4771-96c4-b872d7b19fe2}]
[task 2021-08-23T15:57:36.240Z] 15:57:36     INFO - GECKO(4720) | [Child 6064: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 1 (00FF2680) [pid = 6064] [serial = 37] [outer = 00000000]
[task 2021-08-23T15:57:36.240Z] 15:57:36     INFO - GECKO(4720) | [Child 6064: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (06DE7800) [pid = 6064] [serial = 38] [outer = 00FF2680]
[task 2021-08-23T15:57:36.307Z] 15:57:36     INFO - TEST-INFO | started process screenshot
[task 2021-08-23T15:57:36.392Z] 15:57:36     INFO - TEST-INFO | screenshot: exit 0
[task 2021-08-23T15:57:36.393Z] 15:57:36     INFO - Buffered messages logged at 15:57:32
[task 2021-08-23T15:57:36.393Z] 15:57:36     INFO - Entering test bound moving_works
[task 2021-08-23T15:57:36.394Z] 15:57:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Should have preloaded browser - 
[task 2021-08-23T15:57:36.395Z] 15:57:36     INFO - Buffered messages logged at 15:57:33
[task 2021-08-23T15:57:36.395Z] 15:57:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Preloaded browser should be gone - 
[task 2021-08-23T15:57:36.396Z] 15:57:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Should have moved the preload browser - 
[task 2021-08-23T15:57:36.396Z] 15:57:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Should have the same permanent key - 
[task 2021-08-23T15:57:36.396Z] 15:57:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Preloaded browser is usable when opening a new tab. - 
[task 2021-08-23T15:57:36.396Z] 15:57:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Successfully loaded the tab. - 
[task 2021-08-23T15:57:36.397Z] 15:57:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Managed to open a tab in the original window still. - 
[task 2021-08-23T15:57:36.397Z] 15:57:36     INFO - Leaving test bound moving_works
[task 2021-08-23T15:57:36.397Z] 15:57:36     INFO - Entering test bound moving_shouldnt_move_across_private_state
[task 2021-08-23T15:57:36.398Z] 15:57:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Should have preloaded browser - 
[task 2021-08-23T15:57:36.398Z] 15:57:36     INFO - Console message: [JavaScript Error: "[Exception... "(null)"  nsresult: "0x80040111 (NS_ERROR_NOT_AVAILABLE)"  location: "<unknown>"  data: no]"]
[task 2021-08-23T15:57:36.399Z] 15:57:36     INFO - Buffered messages logged at 15:57:36
[task 2021-08-23T15:57:36.399Z] 15:57:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Preloaded browser in original window should persist - 
[task 2021-08-23T15:57:36.399Z] 15:57:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Should have created another preload browser - 
[task 2021-08-23T15:57:36.399Z] 15:57:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Should not have the same permanent key - 
[task 2021-08-23T15:57:36.400Z] 15:57:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Preloaded browser is usable when opening a new tab. - 
[task 2021-08-23T15:57:36.400Z] 15:57:36     INFO - Buffered messages finished
[task 2021-08-23T15:57:36.400Z] 15:57:36     INFO - TEST-UNEXPECTED-FAIL | browser/modules/test/browser/browser_preloading_tab_moving.js | Uncaught exception - [Exception... "(null)"  nsresult: "0x80040111 (NS_ERROR_NOT_AVAILABLE)"  location: "<unknown>"  data: no]
[task 2021-08-23T15:57:36.400Z] 15:57:36     INFO - Leaving test bound moving_shouldnt_move_across_private_state
[task 2021-08-23T15:57:36.400Z] 15:57:36     INFO - GECKO(4720) | [Child 6064: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (0BE71C00) [pid = 6064] [serial = 39] [outer = 00FF2680]
[task 2021-08-23T15:57:36.400Z] 15:57:36     INFO - GECKO(4720) | [Child 5364, Main Thread] WARNING: '!mCanSend || !mManager || !mManager->CanSend()', file /builds/worker/checkouts/gecko/dom/ipc/JSWindowActorChild.cpp, line 78
[task 2021-08-23T15:57:36.400Z] 15:57:36     INFO - GECKO(4720) | MEMORY STAT | vsize 1113MB | vsizeMaxContiguous 372MB | residentFast 519MB | heapAllocated 259MB
[task 2021-08-23T15:57:36.401Z] 15:57:36     INFO - TEST-OK | browser/modules/test/browser/browser_preloading_tab_moving.js | took 3966ms
[task 2021-08-23T15:57:36.401Z] 15:57:36     INFO - GECKO(4720) | [Child 5364: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 069E9800 == 2 [pid = 5364] [id = {dcf82a31-4632-473c-86de-68896967581e}]
[task 2021-08-23T15:57:36.401Z] 15:57:36     INFO - GECKO(4720) | [Child 5364: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 7 (00BF0AC0) [pid = 5364] [serial = 193] [outer = 00000000]
[task 2021-08-23T15:57:36.401Z] 15:57:36     INFO - GECKO(4720) | [Child 5364: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 8 (08EC4400) [pid = 5364] [serial = 194] [outer = 00BF0AC0]
[task 2021-08-23T15:57:36.401Z] 15:57:36     INFO - GECKO(4720) | [Child 5364: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 9 (0D417800) [pid = 5364] [serial = 195] [outer = 00BF0AC0]
[task 2021-08-23T15:57:36.401Z] 15:57:36     INFO - checking window state
[task 2021-08-23T15:57:36.401Z] 15:57:36     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-08-23T15:57:36.401Z] 15:57:36     INFO - TEST-UNEXPECTED-FAIL | browser/modules/test/browser/browser_preloading_tab_moving.js | Found an unexpected browser window at the end of test run - 
[task 2021-08-23T15:57:36.401Z] 15:57:36     INFO - GECKO(4720) | must wait for focus
```