Bug: Intermittent browser/modules/test/browser/browser_preloading_tab_moving.js | Uncaught exception - AbortError: Actor 'SpecialPowers' destroyed before query 'Spawn' was resolved
Status: RESOLVED
Priority: P5
Resolution: FIXED
Created: 2020-08-14 13:07:47+00:00
Resolved: 2021-09-20 06:35:21+00:00

**Filed by:** malexandru [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer.html#?job_id=313007360&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Dfx4TAGcQzO_50bEYRNekQ/runs/0/artifacts/public/logs/live_backing.log

---

```
[task 2020-08-14T12:08:31.973Z] 12:08:31     INFO - TEST-START | browser/modules/test/browser/browser_preloading_tab_moving.js
[task 2020-08-14T12:08:31.988Z] 12:08:31     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 010ADC00 == 2 [pid = 4244] [id = {a765c516-dfbf-44cc-b10b-854ee83106c7}]
[task 2020-08-14T12:08:31.988Z] 12:08:31     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 5 (0100B8A0) [pid = 4244] [serial = 67] [outer = 00000000]
[task 2020-08-14T12:08:31.989Z] 12:08:31     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 6 (072C4800) [pid = 4244] [serial = 68] [outer = 0100B8A0]
[task 2020-08-14T12:08:31.989Z] 12:08:31     INFO - GECKO(3684) | [Parent 6096: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 1C94AC00 == 11 [pid = 6096] [id = {9029b6ee-9736-4abf-bee9-3fd295d76d4b}]
[task 2020-08-14T12:08:31.989Z] 12:08:31     INFO - GECKO(3684) | [Parent 6096: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 39 (1F3C5790) [pid = 6096] [serial = 203] [outer = 00000000]
[task 2020-08-14T12:08:31.990Z] 12:08:31     INFO - GECKO(3684) | [Parent 6096: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 40 (1C982C00) [pid = 6096] [serial = 204] [outer = 1F3C5790]
[task 2020-08-14T12:08:32.053Z] 12:08:32     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 073D2000 == 1 [pid = 4312] [id = {a0b1244e-f3b1-42e3-a577-f191373d2b4a}] [url = http://example.com/]
[task 2020-08-14T12:08:32.053Z] 12:08:32     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0C08F400 == 0 [pid = 4312] [id = {12b3ae93-6b48-4d4f-8ea5-547022ea2ade}] [url = http://example.com/mypage]
[task 2020-08-14T12:08:32.080Z] 12:08:32     INFO - GECKO(3684) | [Parent 6096, Main Thread] WARNING: NS_ENSURE_TRUE(rootFrame) failed: file /builds/worker/checkouts/gecko/dom/base/nsGlobalWindowOuter.cpp, line 4248
[task 2020-08-14T12:08:32.087Z] 12:08:32     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 7 (072CC000) [pid = 4244] [serial = 69] [outer = 0100B8A0]
[task 2020-08-14T12:08:32.087Z] 12:08:32     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 7 (0130B8A0) [pid = 4312] [serial = 187] [outer = 00000000] [url = http://example.com/]
[task 2020-08-14T12:08:32.294Z] 12:08:32     INFO - GECKO(3684) | [Parent 6096: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 24973400 == 12 [pid = 6096] [id = {d7f2612f-7dbd-4d02-98ea-e614116b7c9a}]
[task 2020-08-14T12:08:32.294Z] 12:08:32     INFO - GECKO(3684) | [Parent 6096: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 41 (1F3C5570) [pid = 6096] [serial = 205] [outer = 00000000]
[task 2020-08-14T12:08:32.354Z] 12:08:32     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 096EB000 == 4 [pid = 6024] [id = {75c55545-6a1f-4e55-a9d6-858ea78b74fc}]
[task 2020-08-14T12:08:32.354Z] 12:08:32     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 24 (0170BF00) [pid = 6024] [serial = 177] [outer = 00000000]
[task 2020-08-14T12:08:32.354Z] 12:08:32     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 25 (096F3000) [pid = 6024] [serial = 178] [outer = 0170BF00]
[task 2020-08-14T12:08:32.434Z] 12:08:32     INFO - GECKO(3684) | [Parent 6096: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 42 (2467D400) [pid = 6096] [serial = 206] [outer = 1F3C5570]
[task 2020-08-14T12:08:32.553Z] 12:08:32     INFO - GECKO(3684) | [Parent 6096, Main Thread] WARNING: NS_ENSURE_TRUE(mPresShell) failed: file /builds/worker/checkouts/gecko/layout/generic/nsFrameSelection.cpp, line 1598
[task 2020-08-14T12:08:32.572Z] 12:08:32     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 26 (1143DC00) [pid = 6024] [serial = 179] [outer = 0170BF00]
[task 2020-08-14T12:08:33.092Z] 12:08:33     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 6 (0D94A800) [pid = 4244] [serial = 66] [outer = 00000000] [url = about:newtab]
[task 2020-08-14T12:08:33.092Z] 12:08:33     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 5 (0BD72400) [pid = 4244] [serial = 65] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:33.107Z] 12:08:33     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 072C9800 == 3 [pid = 4244] [id = {dbf9f6fe-3be5-41d0-85ea-66065621f7a7}]
[task 2020-08-14T12:08:33.107Z] 12:08:33     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 6 (0100BCE0) [pid = 4244] [serial = 70] [outer = 00000000]
[task 2020-08-14T12:08:33.107Z] 12:08:33     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 7 (0BD72400) [pid = 4244] [serial = 71] [outer = 0100BCE0]
[task 2020-08-14T12:08:33.662Z] 12:08:33     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 072C5400 == 4 [pid = 4244] [id = {c136eb24-d7b4-4cb4-b4a7-b38fa9b948d2}]
[task 2020-08-14T12:08:33.662Z] 12:08:33     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 8 (0100BF00) [pid = 4244] [serial = 72] [outer = 00000000]
[task 2020-08-14T12:08:33.662Z] 12:08:33     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 9 (072CA400) [pid = 4244] [serial = 73] [outer = 0100BF00]
[task 2020-08-14T12:08:33.737Z] 12:08:33     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 10 (0BD71C00) [pid = 4244] [serial = 74] [outer = 0100BF00]
[task 2020-08-14T12:08:33.784Z] 12:08:33     INFO - GECKO(3684) | [Parent 6096: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 1FD37800 == 13 [pid = 6096] [id = {dcb0aba1-a374-4a0b-9e56-d688b1d2cff2}]
[task 2020-08-14T12:08:33.784Z] 12:08:33     INFO - GECKO(3684) | [Parent 6096: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 43 (1F3C6010) [pid = 6096] [serial = 207] [outer = 00000000]
[task 2020-08-14T12:08:33.784Z] 12:08:33     INFO - GECKO(3684) | [Parent 6096: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 44 (2209C000) [pid = 6096] [serial = 208] [outer = 1F3C6010]
[task 2020-08-14T12:08:33.844Z] 12:08:33     INFO - GECKO(3684) | [Parent 6096, Main Thread] WARNING: NS_ENSURE_TRUE(rootFrame) failed: file /builds/worker/checkouts/gecko/dom/base/nsGlobalWindowOuter.cpp, line 4248
[task 2020-08-14T12:08:33.991Z] 12:08:33     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 072CD000 == 5 [pid = 4244] [id = {9130ce40-17c9-4e55-af06-f2ad5f1e7f2d}]
[task 2020-08-14T12:08:33.992Z] 12:08:33     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 11 (0100C010) [pid = 4244] [serial = 75] [outer = 00000000]
[task 2020-08-14T12:08:33.992Z] 12:08:33     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 12 (072D0C00) [pid = 4244] [serial = 76] [outer = 0100C010]
[task 2020-08-14T12:08:34.012Z] 12:08:34     INFO - GECKO(3684) | [Child 4244, Main Thread] WARNING: '!CanSend() || !mManager || !mManager->CanSend()', file /builds/worker/checkouts/gecko/dom/ipc/jsactor/JSWindowActorChild.cpp, line 42
[task 2020-08-14T12:08:34.012Z] 12:08:34     INFO - GECKO(3684) | [Child 4244, Main Thread] WARNING: NS_ENSURE_TRUE(!mHasOrHasHadOwnerWindow || mOwnerWindow) failed: file /builds/worker/checkouts/gecko/dom/events/DOMEventTargetHelper.cpp, line 291
[task 2020-08-14T12:08:34.047Z] 12:08:34     INFO - GECKO(3684) | [Parent 6096: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 2572F800 == 14 [pid = 6096] [id = {9df7ff73-a7c1-4478-9dc3-2d0c3c1f7dc1}]
[task 2020-08-14T12:08:34.047Z] 12:08:34     INFO - GECKO(3684) | [Parent 6096: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 45 (1F3C5460) [pid = 6096] [serial = 209] [outer = 00000000]
[task 2020-08-14T12:08:34.066Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 25 (096A2800) [pid = 6024] [serial = 152] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:34.067Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 24 (096E8400) [pid = 6024] [serial = 161] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:34.068Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 23 (096EFC00) [pid = 6024] [serial = 165] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:34.068Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 22 (096A3800) [pid = 6024] [serial = 158] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:34.068Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 21 (096A0400) [pid = 6024] [serial = 155] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:34.069Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 20 (0C1AC000) [pid = 6024] [serial = 169] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:34.069Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 096EB000 == 3 [pid = 6024] [id = {75c55545-6a1f-4e55-a9d6-858ea78b74fc}] [url = about:blank]
[task 2020-08-14T12:08:34.069Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0969C400 == 2 [pid = 6024] [id = {5563afd3-a3fa-476d-95ee-d4b077196b35}] [url = about:blank]
[task 2020-08-14T12:08:34.070Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 19 (096ED000) [pid = 6024] [serial = 159] [outer = 00000000] [url = http://example.com/]
[task 2020-08-14T12:08:34.070Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 18 (096F4000) [pid = 6024] [serial = 162] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:34.070Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 17 (0969A000) [pid = 6024] [serial = 154] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:34.071Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 16 (0969D000) [pid = 6024] [serial = 157] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:34.071Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 15 (096F7000) [pid = 6024] [serial = 166] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:34.071Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 096F7400 == 1 [pid = 6024] [id = {49eb1095-b4dd-493a-b761-30c93843903d}] [url = about:blank]
[task 2020-08-14T12:08:34.071Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 076C4800 == 0 [pid = 6024] [id = {19244de9-c0ce-4a84-9d72-d82c769b28af}] [url = about:blank]
[task 2020-08-14T12:08:34.111Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 09699C00 == 1 [pid = 6024] [id = {7402aa9a-68b7-42af-8637-babf2f3a1bd3}]
[task 2020-08-14T12:08:34.111Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 16 (0170C780) [pid = 6024] [serial = 180] [outer = 00000000]
[task 2020-08-14T12:08:34.111Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 17 (0969DC00) [pid = 6024] [serial = 181] [outer = 0170C780]
[task 2020-08-14T12:08:34.131Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 16 (0170C340) [pid = 6024] [serial = 160] [outer = 00000000] [url = http://mochi.test:8888/browser/browser/modules/test/browser/?q=example]
[task 2020-08-14T12:08:34.131Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 15 (0170C450) [pid = 6024] [serial = 164] [outer = 00000000] [url = http://example.com/]
[task 2020-08-14T12:08:34.238Z] 12:08:34     INFO - GECKO(3684) | [Parent 6096: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 46 (25731800) [pid = 6096] [serial = 210] [outer = 1F3C5460]
[task 2020-08-14T12:08:34.273Z] 12:08:34     INFO - GECKO(3684) | [Child 4244: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 13 (0D94A000) [pid = 4244] [serial = 77] [outer = 0100C010]
[task 2020-08-14T12:08:34.372Z] 12:08:34     INFO - GECKO(3684) | [Parent 6096, Main Thread] WARNING: NS_ENSURE_TRUE(mPresShell) failed: file /builds/worker/checkouts/gecko/layout/generic/nsFrameSelection.cpp, line 1598
[task 2020-08-14T12:08:34.607Z] 12:08:34     INFO - GECKO(3684) | [Child 6024: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 16 (096A5400) [pid = 6024] [serial = 182] [outer = 0170C780]
[task 2020-08-14T12:08:35.162Z] 12:08:35     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 073D2C00 == 1 [pid = 4312] [id = {87b1f066-90c4-4683-a8c4-013c11d450d2}]
[task 2020-08-14T12:08:35.162Z] 12:08:35     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 8 (0130B8A0) [pid = 4312] [serial = 195] [outer = 00000000]
[task 2020-08-14T12:08:35.162Z] 12:08:35     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 9 (0C091000) [pid = 4312] [serial = 196] [outer = 0130B8A0]
[task 2020-08-14T12:08:35.937Z] 12:08:35     INFO - GECKO(3684) | [Child 5440: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0D07B000 == 1 [pid = 5440] [id = {1b47bb80-a852-4389-9acb-5f730364efb1}] [url = about:blank]
[task 2020-08-14T12:08:35.937Z] 12:08:35     INFO - GECKO(3684) | [Child 5440: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 14 (0D073400) [pid = 5440] [serial = 170] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:35.937Z] 12:08:35     INFO - GECKO(3684) | [Child 5440: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 13 (0BD95400) [pid = 5440] [serial = 166] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:35.938Z] 12:08:35     INFO - GECKO(3684) | [Child 5440: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 12 (0D075000) [pid = 5440] [serial = 167] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:35.938Z] 12:08:35     INFO - GECKO(3684) | [Child 5440: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 11 (0D33C400) [pid = 5440] [serial = 173] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:35.973Z] 12:08:35     INFO - GECKO(3684) | [Child 5572: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 06DC4400 == 1 [pid = 5572] [id = {bc14a9f0-c592-4f99-ae48-4d64c6d1676c}]
[task 2020-08-14T12:08:35.973Z] 12:08:35     INFO - GECKO(3684) | [Child 5572: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 1 (00B0B8A0) [pid = 5572] [serial = 37] [outer = 00000000]
[task 2020-08-14T12:08:35.973Z] 12:08:35     INFO - GECKO(3684) | [Child 5572: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (06DCD800) [pid = 5572] [serial = 38] [outer = 00B0B8A0]
[task 2020-08-14T12:08:35.981Z] 12:08:35     INFO - GECKO(3684) | [Child 5440: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 10 (0130C560) [pid = 5440] [serial = 162] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:35.981Z] 12:08:35     INFO - GECKO(3684) | [Child 5440: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 9 (0130B8A0) [pid = 5440] [serial = 165] [outer = 00000000] [url = http://example.com/]
[task 2020-08-14T12:08:35.981Z] 12:08:35     INFO - GECKO(3684) | [Child 5440: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 8 (0130C230) [pid = 5440] [serial = 172] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:35.982Z] 12:08:35     INFO - GECKO(3684) | [Child 5440: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 7 (0130B9B0) [pid = 5440] [serial = 169] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:35.997Z] 12:08:35     INFO - GECKO(3684) | [Child 5572: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (06DD0000) [pid = 5572] [serial = 39] [outer = 00B0B8A0]
[task 2020-08-14T12:08:36.014Z] 12:08:36     INFO - GECKO(3684) | [Parent 6096, Main Thread] WARNING: 'aOwner->IsDiscarded()', file /builds/worker/workspace/obj-build/dist/include/mozilla/dom/SyncedContextInlines.h, line 36
[task 2020-08-14T12:08:36.014Z] 12:08:36     INFO - GECKO(3684) | [Child 4312, Main Thread] WARNING: '!CanSend() || !mManager || !mManager->CanSend()', file /builds/worker/checkouts/gecko/dom/ipc/jsactor/JSWindowActorChild.cpp, line 42
[task 2020-08-14T12:08:36.014Z] 12:08:36     INFO - TEST-INFO | started process screenshot
[task 2020-08-14T12:08:36.081Z] 12:08:36     INFO - TEST-INFO | screenshot: exit 0
[task 2020-08-14T12:08:36.082Z] 12:08:36     INFO - Buffered messages logged at 12:08:31
[task 2020-08-14T12:08:36.083Z] 12:08:36     INFO - Entering test bound moving_works
[task 2020-08-14T12:08:36.083Z] 12:08:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Should have preloaded browser - 
[task 2020-08-14T12:08:36.084Z] 12:08:36     INFO - Buffered messages logged at 12:08:33
[task 2020-08-14T12:08:36.084Z] 12:08:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Preloaded browser should be gone - 
[task 2020-08-14T12:08:36.085Z] 12:08:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Should have moved the preload browser - 
[task 2020-08-14T12:08:36.085Z] 12:08:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Should have the same permanent key - 
[task 2020-08-14T12:08:36.085Z] 12:08:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Preloaded browser is usable when opening a new tab. - 
[task 2020-08-14T12:08:36.085Z] 12:08:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Successfully loaded the tab. - 
[task 2020-08-14T12:08:36.086Z] 12:08:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Managed to open a tab in the original window still. - 
[task 2020-08-14T12:08:36.086Z] 12:08:36     INFO - Leaving test bound moving_works
[task 2020-08-14T12:08:36.087Z] 12:08:36     INFO - Entering test bound moving_shouldnt_move_across_private_state
[task 2020-08-14T12:08:36.087Z] 12:08:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Should have preloaded browser - 
[task 2020-08-14T12:08:36.088Z] 12:08:36     INFO - Console message: [JavaScript Error: "AbortError: Actor 'SpecialPowers' destroyed before query 'Spawn' was resolved"]
[task 2020-08-14T12:08:36.088Z] 12:08:36     INFO - Buffered messages logged at 12:08:35
[task 2020-08-14T12:08:36.088Z] 12:08:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Preloaded browser in original window should persist - 
[task 2020-08-14T12:08:36.089Z] 12:08:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Should have created another preload browser - 
[task 2020-08-14T12:08:36.089Z] 12:08:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Should not have the same permanent key - 
[task 2020-08-14T12:08:36.090Z] 12:08:36     INFO - TEST-PASS | browser/modules/test/browser/browser_preloading_tab_moving.js | Preloaded browser is usable when opening a new tab. - 
[task 2020-08-14T12:08:36.090Z] 12:08:36     INFO - Buffered messages finished
[task 2020-08-14T12:08:36.090Z] 12:08:36     INFO - TEST-UNEXPECTED-FAIL | browser/modules/test/browser/browser_preloading_tab_moving.js | Uncaught exception - AbortError: Actor 'SpecialPowers' destroyed before query 'Spawn' was resolved
[task 2020-08-14T12:08:36.091Z] 12:08:36     INFO - Leaving test bound moving_shouldnt_move_across_private_state
[task 2020-08-14T12:08:36.091Z] 12:08:36     INFO - GECKO(3684) | MEMORY STAT | vsize 1131MB | vsizeMaxContiguous 331MB | residentFast 479MB | heapAllocated 228MB
[task 2020-08-14T12:08:36.091Z] 12:08:36     INFO - TEST-OK | browser/modules/test/browser/browser_preloading_tab_moving.js | took 4072ms
[task 2020-08-14T12:08:36.091Z] 12:08:36     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 0C095000 == 2 [pid = 4312] [id = {07b9ae48-4b10-472c-be14-8760d83508bd}]
[task 2020-08-14T12:08:36.092Z] 12:08:36     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 10 (0130C120) [pid = 4312] [serial = 197] [outer = 00000000]
[task 2020-08-14T12:08:36.092Z] 12:08:36     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 11 (0C098800) [pid = 4312] [serial = 198] [outer = 0130C120]
[task 2020-08-14T12:08:36.092Z] 12:08:36     INFO - checking window state
[task 2020-08-14T12:08:36.093Z] 12:08:36     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-08-14T12:08:36.093Z] 12:08:36     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 2020-08-14T12:08:36.093Z] 12:08:36     INFO - GECKO(3684) | must wait for focus
[task 2020-08-14T12:08:36.094Z] 12:08:36     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 12 (0D7C8000) [pid = 4312] [serial = 199] [outer = 0130C120]
[task 2020-08-14T12:08:36.209Z] 12:08:36     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 11 (0D7C0C00) [pid = 4312] [serial = 190] [outer = 00000000] [url = http://example.com/]
[task 2020-08-14T12:08:36.209Z] 12:08:36     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 10 (0C08E800) [pid = 4312] [serial = 188] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:36.209Z] 12:08:36     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 9 (0C098400) [pid = 4312] [serial = 189] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:36.209Z] 12:08:36     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 8 (0C094C00) [pid = 4312] [serial = 192] [outer = 00000000] [url = about:blank]
[task 2020-08-14T12:08:36.210Z] 12:08:36     INFO - GECKO(3684) | [Child 4312: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 073D2C00 == 1 [pid = 4312] [id = {87b1f066-90c4-4683-a8c4-013c11d450d2}] [url = about:blank]
[task 2020-08-14T12:08:36.210Z] 12:08:36     INFO - TEST-START | browser/modules/test/browser/browser_taskbar_preview.js
```