Bug: Intermittent browser_undo_close_tabs.js | SessionStore should know how many tabs were just closed - Got 2, expected 3 | Uncaught exception - waiting for tab 2 to load
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2020-05-30 08:31:18+00:00
Resolved: 2024-10-08 05:07:02+00:00

**Filed by:** malexandru [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer.html#?job_id=304372330&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/QcrHAbUlRkCSojDPW310dA/runs/0/artifacts/public/logs/live_backing.log
**Reftest URL:** https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/QcrHAbUlRkCSojDPW310dA/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

---

```
[task 2020-05-30T07:15:14.095Z] 07:15:14     INFO - TEST-START | browser/base/content/test/tabs/browser_undo_close_tabs.js
[task 2020-05-30T07:15:14.160Z] 07:15:14     INFO - GECKO(1919) | [1924, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:14.161Z] 07:15:14     INFO - GECKO(1919) | [1924, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:14.161Z] 07:15:14     INFO - GECKO(1919) | ### XPCOM_MEM_BLOAT_LOG defined -- logging bloat/leaks to /var/folders/yl/zz3dpdmn4m5_gmhscnkc2q3c000017/T/tmpCdZOAk.mozrunner/runtests_leaks_tab_pid1924.log
[task 2020-05-30T07:15:14.161Z] 07:15:14     INFO - GECKO(1919) | [1924, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:14.161Z] 07:15:14     INFO - GECKO(1919) | [1924, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:14.161Z] 07:15:14     INFO - GECKO(1919) | [1924, Main Thread] WARNING: XPCOM_MEM_BLOAT_LOG is set, disabling native allocations.: file /builds/worker/checkouts/gecko/tools/profiler/core/platform.cpp, line 243
[task 2020-05-30T07:15:14.573Z] 07:15:14     INFO - GECKO(1919) | [Child 1924: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 0x115671c00 == 1 [pid = 1924] [id = {50c3c37b-1fdd-3c48-908c-20dce6af6a00}]
[task 2020-05-30T07:15:14.573Z] 07:15:14     INFO - GECKO(1919) | [Child 1924: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 1 (0x11550b520) [pid = 1924] [serial = 1] [outer = 0x0]
[task 2020-05-30T07:15:14.573Z] 07:15:14     INFO - GECKO(1919) | [Child 1924: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (0x11ca6ac00) [pid = 1924] [serial = 2] [outer = 0x11550b520]
[task 2020-05-30T07:15:14.614Z] 07:15:14     INFO - GECKO(1919) | [Child 1924: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (0x11c527400) [pid = 1924] [serial = 3] [outer = 0x11550b520]
[task 2020-05-30T07:15:14.756Z] 07:15:14     INFO - GECKO(1919) | [1925, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:14.757Z] 07:15:14     INFO - GECKO(1919) | [1925, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:14.757Z] 07:15:14     INFO - GECKO(1919) | ### XPCOM_MEM_BLOAT_LOG defined -- logging bloat/leaks to /var/folders/yl/zz3dpdmn4m5_gmhscnkc2q3c000017/T/tmpCdZOAk.mozrunner/runtests_leaks_tab_pid1925.log
[task 2020-05-30T07:15:14.757Z] 07:15:14     INFO - GECKO(1919) | [1925, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:14.757Z] 07:15:14     INFO - GECKO(1919) | [1925, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:14.757Z] 07:15:14     INFO - GECKO(1919) | [1925, Main Thread] WARNING: XPCOM_MEM_BLOAT_LOG is set, disabling native allocations.: file /builds/worker/checkouts/gecko/tools/profiler/core/platform.cpp, line 243
[task 2020-05-30T07:15:15.116Z] 07:15:15     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 0x101b71c00 == 1 [pid = 1925] [id = {1f29c719-5048-f142-be5e-5ad223167f94}]
[task 2020-05-30T07:15:15.116Z] 07:15:15     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 1 (0x101a0b520) [pid = 1925] [serial = 1] [outer = 0x0]
[task 2020-05-30T07:15:15.116Z] 07:15:15     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (0x108c67c00) [pid = 1925] [serial = 2] [outer = 0x101a0b520]
[task 2020-05-30T07:15:15.195Z] 07:15:15     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (0x10872c400) [pid = 1925] [serial = 3] [outer = 0x101a0b520]
[task 2020-05-30T07:15:15.662Z] 07:15:15     INFO - GECKO(1919) | [1926, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:15.662Z] 07:15:15     INFO - GECKO(1919) | [1926, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:15.662Z] 07:15:15     INFO - GECKO(1919) | ### XPCOM_MEM_BLOAT_LOG defined -- logging bloat/leaks to /var/folders/yl/zz3dpdmn4m5_gmhscnkc2q3c000017/T/tmpCdZOAk.mozrunner/runtests_leaks_tab_pid1926.log
[task 2020-05-30T07:15:15.662Z] 07:15:15     INFO - GECKO(1919) | [1926, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:15.663Z] 07:15:15     INFO - GECKO(1919) | [1926, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:15.663Z] 07:15:15     INFO - GECKO(1919) | [1926, Main Thread] WARNING: XPCOM_MEM_BLOAT_LOG is set, disabling native allocations.: file /builds/worker/checkouts/gecko/tools/profiler/core/platform.cpp, line 243
[task 2020-05-30T07:15:16.177Z] 07:15:16     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 0x124633400 == 1 [pid = 1926] [id = {32692753-b9f3-3b49-9480-d4766af53641}]
[task 2020-05-30T07:15:16.177Z] 07:15:16     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 1 (0x11040b520) [pid = 1926] [serial = 1] [outer = 0x0]
[task 2020-05-30T07:15:16.177Z] 07:15:16     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (0x124a69000) [pid = 1926] [serial = 2] [outer = 0x11040b520]
[task 2020-05-30T07:15:16.266Z] 07:15:16     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (0x124633800) [pid = 1926] [serial = 3] [outer = 0x11040b520]
[task 2020-05-30T07:15:16.379Z] 07:15:16     INFO - GECKO(1919) | [1927, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:16.379Z] 07:15:16     INFO - GECKO(1919) | [1927, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:16.379Z] 07:15:16     INFO - GECKO(1919) | ### XPCOM_MEM_BLOAT_LOG defined -- logging bloat/leaks to /var/folders/yl/zz3dpdmn4m5_gmhscnkc2q3c000017/T/tmpCdZOAk.mozrunner/runtests_leaks_tab_pid1927.log
[task 2020-05-30T07:15:16.379Z] 07:15:16     INFO - GECKO(1919) | [1927, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:16.380Z] 07:15:16     INFO - GECKO(1919) | [1927, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:16.380Z] 07:15:16     INFO - GECKO(1919) | [1927, Main Thread] WARNING: XPCOM_MEM_BLOAT_LOG is set, disabling native allocations.: file /builds/worker/checkouts/gecko/tools/profiler/core/platform.cpp, line 243
[task 2020-05-30T07:15:16.894Z] 07:15:16     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 0x10dd71c00 == 1 [pid = 1927] [id = {dbbd5cd8-6b7d-574a-91a1-52d5a0707b53}]
[task 2020-05-30T07:15:16.895Z] 07:15:16     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 1 (0x10d30b520) [pid = 1927] [serial = 1] [outer = 0x0]
[task 2020-05-30T07:15:16.895Z] 07:15:16     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (0x10e86ac00) [pid = 1927] [serial = 2] [outer = 0x10d30b520]
[task 2020-05-30T07:15:16.976Z] 07:15:16     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (0x10e339800) [pid = 1927] [serial = 3] [outer = 0x10d30b520]
[task 2020-05-30T07:15:17.383Z] 07:15:17     INFO - GECKO(1919) | [Child 1921: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x10e461000 == 0 [pid = 1921] [id = {3828e660-feaf-814e-b2ad-9f6d2689c92b}] [url = about:blank]
[task 2020-05-30T07:15:17.873Z] 07:15:17     INFO - TEST-INFO | started process screencapture
[task 2020-05-30T07:15:18.029Z] 07:15:18     INFO - TEST-INFO | screencapture: exit 0
[task 2020-05-30T07:15:18.029Z] 07:15:18     INFO - Buffered messages logged at 07:15:14
[task 2020-05-30T07:15:18.030Z] 07:15:18     INFO - Entering test bound setPref
[task 2020-05-30T07:15:18.030Z] 07:15:18     INFO - Leaving test bound setPref
[task 2020-05-30T07:15:18.030Z] 07:15:18     INFO - Entering test bound withMultiSelectedTabs
[task 2020-05-30T07:15:18.030Z] 07:15:18     INFO - Buffered messages logged at 07:15:17
[task 2020-05-30T07:15:18.030Z] 07:15:18     INFO - TEST-PASS | browser/base/content/test/tabs/browser_undo_close_tabs.js | Zero multiselected tabs - 
[task 2020-05-30T07:15:18.030Z] 07:15:18     INFO - TEST-PASS | browser/base/content/test/tabs/browser_undo_close_tabs.js | InitialTab is not multiselected - 
[task 2020-05-30T07:15:18.031Z] 07:15:18     INFO - TEST-PASS | browser/base/content/test/tabs/browser_undo_close_tabs.js | Tab1 is not multiselected - 
[task 2020-05-30T07:15:18.031Z] 07:15:18     INFO - TEST-PASS | browser/base/content/test/tabs/browser_undo_close_tabs.js | Tab2 is multiselected - 
[task 2020-05-30T07:15:18.031Z] 07:15:18     INFO - TEST-PASS | browser/base/content/test/tabs/browser_undo_close_tabs.js | Tab3 is multiselected - 
[task 2020-05-30T07:15:18.031Z] 07:15:18     INFO - TEST-PASS | browser/base/content/test/tabs/browser_undo_close_tabs.js | Tab4 is multiselected - 
[task 2020-05-30T07:15:18.031Z] 07:15:18     INFO - TEST-PASS | browser/base/content/test/tabs/browser_undo_close_tabs.js | Two multiselected tabs - 
[task 2020-05-30T07:15:18.031Z] 07:15:18     INFO - Buffered messages finished
[task 2020-05-30T07:15:18.031Z] 07:15:18     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_undo_close_tabs.js | SessionStore should know how many tabs were just closed - Got 2, expected 3
[task 2020-05-30T07:15:18.032Z] 07:15:18     INFO - Stack trace:
[task 2020-05-30T07:15:18.032Z] 07:15:18     INFO - chrome://mochikit/content/browser-test.js:test_is:1327
[task 2020-05-30T07:15:18.032Z] 07:15:18     INFO - chrome://mochitests/content/browser/browser/base/content/test/tabs/browser_undo_close_tabs.js:withMultiSelectedTabs:36
[task 2020-05-30T07:15:18.032Z] 07:15:18     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest/<:1064
[task 2020-05-30T07:15:18.032Z] 07:15:18     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1104
[task 2020-05-30T07:15:18.032Z] 07:15:18     INFO - chrome://mochikit/content/browser-test.js:nextTest/<:927
[task 2020-05-30T07:15:18.032Z] 07:15:18     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/waitForFocusInner/focusedOrLoaded/<:918
[task 2020-05-30T07:15:18.032Z] 07:15:18     INFO - GECKO(1919) | [1929, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:18.032Z] 07:15:18     INFO - GECKO(1919) | [1929, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:18.032Z] 07:15:18     INFO - GECKO(1919) | ### XPCOM_MEM_BLOAT_LOG defined -- logging bloat/leaks to /var/folders/yl/zz3dpdmn4m5_gmhscnkc2q3c000017/T/tmpCdZOAk.mozrunner/runtests_leaks_tab_pid1929.log
[task 2020-05-30T07:15:18.032Z] 07:15:18     INFO - GECKO(1919) | [1929, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:18.033Z] 07:15:18     INFO - GECKO(1919) | [1929, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:18.033Z] 07:15:18     INFO - GECKO(1919) | [1929, Main Thread] WARNING: XPCOM_MEM_BLOAT_LOG is set, disabling native allocations.: file /builds/worker/checkouts/gecko/tools/profiler/core/platform.cpp, line 243
[task 2020-05-30T07:15:18.129Z] 07:15:18     INFO - GECKO(1919) | [1931, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:18.129Z] 07:15:18     INFO - GECKO(1919) | [1931, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:18.129Z] 07:15:18     INFO - GECKO(1919) | ### XPCOM_MEM_BLOAT_LOG defined -- logging bloat/leaks to /var/folders/yl/zz3dpdmn4m5_gmhscnkc2q3c000017/T/tmpCdZOAk.mozrunner/runtests_leaks_tab_pid1931.log
[task 2020-05-30T07:15:18.129Z] 07:15:18     INFO - GECKO(1919) | [1931, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:18.129Z] 07:15:18     INFO - GECKO(1919) | [1931, MainThread] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file /builds/worker/checkouts/gecko/xpcom/base/nsTraceRefcnt.cpp, line 202
[task 2020-05-30T07:15:18.130Z] 07:15:18     INFO - GECKO(1919) | [1931, Main Thread] WARNING: XPCOM_MEM_BLOAT_LOG is set, disabling native allocations.: file /builds/worker/checkouts/gecko/tools/profiler/core/platform.cpp, line 243
[task 2020-05-30T07:15:18.592Z] 07:15:18     INFO - GECKO(1919) | [Child 1929: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 0x10d671800 == 1 [pid = 1929] [id = {9db9991b-dcca-1e4c-bae8-680076e4c11b}]
[task 2020-05-30T07:15:18.592Z] 07:15:18     INFO - GECKO(1919) | [Child 1929: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 1 (0x10cd0b520) [pid = 1929] [serial = 1] [outer = 0x0]
[task 2020-05-30T07:15:18.592Z] 07:15:18     INFO - GECKO(1919) | [Child 1929: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (0x11006a800) [pid = 1929] [serial = 2] [outer = 0x10cd0b520]
[task 2020-05-30T07:15:18.765Z] 07:15:18     INFO - GECKO(1919) | [Child 1931: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 0x111b48800 == 1 [pid = 1931] [id = {b10dc401-6acb-2d40-823e-0e1f8e308a49}]
[task 2020-05-30T07:15:18.788Z] 07:15:18     INFO - GECKO(1919) | [Child 1931: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 1 (0x10aa0b520) [pid = 1931] [serial = 1] [outer = 0x0]
[task 2020-05-30T07:15:18.788Z] 07:15:18     INFO - GECKO(1919) | [Child 1931: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (0x112065800) [pid = 1931] [serial = 2] [outer = 0x10aa0b520]
[task 2020-05-30T07:15:18.842Z] 07:15:18     INFO - GECKO(1919) | [Child 1929: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (0x128b28c00) [pid = 1929] [serial = 3] [outer = 0x10cd0b520]
[task 2020-05-30T07:15:19.137Z] 07:15:19     INFO - GECKO(1919) | [Child 1931: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (0x12672a800) [pid = 1931] [serial = 3] [outer = 0x10aa0b520]
[task 2020-05-30T07:15:21.757Z] 07:15:21     INFO - GECKO(1919) | [Child 1921: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 3 (0x11095f400) [pid = 1921] [serial = 2] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:21.766Z] 07:15:21     INFO - GECKO(1919) | [Child 1921: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (0x10da0b520) [pid = 1921] [serial = 1] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:23.063Z] 07:15:23     INFO - GECKO(1919) | [Child 1920: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 14 (0x12421ec00) [pid = 1920] [serial = 4] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:23.063Z] 07:15:23     INFO - GECKO(1919) | [Child 1920: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 13 (0x124224800) [pid = 1920] [serial = 10] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:23.063Z] 07:15:23     INFO - GECKO(1919) | [Child 1920: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 12 (0x10ca26800) [pid = 1920] [serial = 2] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:23.068Z] 07:15:23     INFO - GECKO(1919) | [Child 1920: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 11 (0x124220000) [pid = 1920] [serial = 6] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:23.068Z] 07:15:23     INFO - GECKO(1919) | [Child 1920: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 10 (0x124222000) [pid = 1920] [serial = 8] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:23.202Z] 07:15:23     INFO - GECKO(1919) | [Child 1920: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x10ca27800 == 4 [pid = 1920] [id = {f202ca9d-e8df-0d46-8adf-774b79ae75f7}] [url = moz-extension://3ebea703-482f-8646-a576-c31cca15a767/_generated_background_page.html]
[task 2020-05-30T07:15:23.203Z] 07:15:23     INFO - GECKO(1919) | [Child 1920: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 9 (0x10850b6f0) [pid = 1920] [serial = 3] [outer = 0x0] [url = moz-extension://3ebea703-482f-8646-a576-c31cca15a767/_generated_background_page.html]
[task 2020-05-30T07:15:23.276Z] 07:15:23     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x101b71c00 == 0 [pid = 1925] [id = {1f29c719-5048-f142-be5e-5ad223167f94}] [url = https://example.com/2]
[task 2020-05-30T07:15:24.560Z] 07:15:24     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x124633400 == 0 [pid = 1926] [id = {32692753-b9f3-3b49-9480-d4766af53641}] [url = https://example.com/3]
[task 2020-05-30T07:15:25.111Z] 07:15:25     INFO - GECKO(1919) | [Child 1923: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (0x12486c000) [pid = 1923] [serial = 2] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:25.262Z] 07:15:25     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x10dd71c00 == 0 [pid = 1927] [id = {dbbd5cd8-6b7d-574a-91a1-52d5a0707b53}] [url = https://example.com/4]
[task 2020-05-30T07:15:25.928Z] 07:15:25     INFO - GECKO(1919) | [Child 1921: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (0x12a018400) [pid = 1921] [serial = 4] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:25.928Z] 07:15:25     INFO - GECKO(1919) | [Child 1921: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (0x10e416400) [pid = 1921] [serial = 3] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:26.826Z] 07:15:26     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-05-30T07:15:26.826Z] 07:15:26     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_undo_close_tabs.js | Uncaught exception - wait for the tabs to reopen - timed out after 50 tries.
[task 2020-05-30T07:15:26.828Z] 07:15:26     INFO - Leaving test bound withMultiSelectedTabs
[task 2020-05-30T07:15:26.829Z] 07:15:26     INFO - Entering test bound withCloseTabsToTheRight
[task 2020-05-30T07:15:26.866Z] 07:15:26     INFO - GECKO(1919) | [Child 1921: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 0x10e460000 == 1 [pid = 1921] [id = {59d7a797-cdf7-184d-9c0e-90712f89f195}]
[task 2020-05-30T07:15:26.867Z] 07:15:26     INFO - GECKO(1919) | [Child 1921: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 1 (0x10da0b520) [pid = 1921] [serial = 5] [outer = 0x0]
[task 2020-05-30T07:15:26.867Z] 07:15:26     INFO - GECKO(1919) | [Child 1921: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (0x11095ec00) [pid = 1921] [serial = 6] [outer = 0x10da0b520]
[task 2020-05-30T07:15:26.995Z] 07:15:26     INFO - GECKO(1919) | [Child 1921: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (0x13a6f2800) [pid = 1921] [serial = 7] [outer = 0x10da0b520]
[task 2020-05-30T07:15:27.103Z] 07:15:27     INFO - GECKO(1919) | [Child 1924: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (0x11ca6ac00) [pid = 1924] [serial = 2] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:27.103Z] 07:15:27     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 0x140127c00 == 1 [pid = 1925] [id = {79a40d08-e345-6146-835d-22eecd78b798}]
[task 2020-05-30T07:15:27.103Z] 07:15:27     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 4 (0x108afcc10) [pid = 1925] [serial = 4] [outer = 0x0]
[task 2020-05-30T07:15:27.103Z] 07:15:27     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 5 (0x140128c00) [pid = 1925] [serial = 5] [outer = 0x108afcc10]
[task 2020-05-30T07:15:27.290Z] 07:15:27     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 6 (0x140146000) [pid = 1925] [serial = 6] [outer = 0x108afcc10]
[task 2020-05-30T07:15:27.326Z] 07:15:27     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 0x14ef2d000 == 1 [pid = 1926] [id = {c8610a58-2085-a14e-99e5-5ebfbb41562c}]
[task 2020-05-30T07:15:27.326Z] 07:15:27     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 4 (0x127aa7c10) [pid = 1926] [serial = 4] [outer = 0x0]
[task 2020-05-30T07:15:27.326Z] 07:15:27     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 5 (0x14ef2e000) [pid = 1926] [serial = 5] [outer = 0x127aa7c10]
[task 2020-05-30T07:15:27.432Z] 07:15:27     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 6 (0x14ef47800) [pid = 1926] [serial = 6] [outer = 0x127aa7c10]
[task 2020-05-30T07:15:27.501Z] 07:15:27     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 0x14bf2d800 == 1 [pid = 1927] [id = {c4e20522-c33d-fe4a-8725-bf32b46e9b5e}]
[task 2020-05-30T07:15:27.501Z] 07:15:27     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 4 (0x13d378c10) [pid = 1927] [serial = 4] [outer = 0x0]
[task 2020-05-30T07:15:27.502Z] 07:15:27     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 5 (0x14bf2e800) [pid = 1927] [serial = 5] [outer = 0x13d378c10]
[task 2020-05-30T07:15:27.607Z] 07:15:27     INFO - GECKO(1919) | [Child 1920: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 8 (0x1242e7800) [pid = 1920] [serial = 12] [outer = 0x0] [url = moz-extension://3ebea703-482f-8646-a576-c31cca15a767/_generated_background_page.html]
[task 2020-05-30T07:15:27.680Z] 07:15:27     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 6 (0x14bf4b000) [pid = 1927] [serial = 6] [outer = 0x13d378c10]
[task 2020-05-30T07:15:27.879Z] 07:15:27     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 5 (0x108c67c00) [pid = 1925] [serial = 2] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:27.925Z] 07:15:27     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 4 (0x101a0b520) [pid = 1925] [serial = 1] [outer = 0x0] [url = https://example.com/2]
[task 2020-05-30T07:15:28.987Z] 07:15:28     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 5 (0x124a69000) [pid = 1926] [serial = 2] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:28.987Z] 07:15:28     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x14ef2d000 == 0 [pid = 1926] [id = {c8610a58-2085-a14e-99e5-5ebfbb41562c}] [url = https://example.com/3]
[task 2020-05-30T07:15:29.018Z] 07:15:29     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 4 (0x11040b520) [pid = 1926] [serial = 1] [outer = 0x0] [url = https://example.com/3]
[task 2020-05-30T07:15:29.491Z] 07:15:29     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 5 (0x10e86ac00) [pid = 1927] [serial = 2] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:29.491Z] 07:15:29     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x14bf2d800 == 0 [pid = 1927] [id = {c4e20522-c33d-fe4a-8725-bf32b46e9b5e}] [url = https://example.com/4]
[task 2020-05-30T07:15:29.500Z] 07:15:29     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 4 (0x10d30b520) [pid = 1927] [serial = 1] [outer = 0x0] [url = https://example.com/4]
[task 2020-05-30T07:15:32.061Z] 07:15:32     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 3 (0x10872c400) [pid = 1925] [serial = 3] [outer = 0x0] [url = https://example.com/2]
[task 2020-05-30T07:15:32.061Z] 07:15:32     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (0x140128c00) [pid = 1925] [serial = 5] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:32.061Z] 07:15:32     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 0x140127c00 == 0 [pid = 1925] [id = {79a40d08-e345-6146-835d-22eecd78b798}] [url = https://example.com/2]
[task 2020-05-30T07:15:32.141Z] 07:15:32     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (0x108afcc10) [pid = 1925] [serial = 4] [outer = 0x0] [url = https://example.com/2]
[task 2020-05-30T07:15:33.240Z] 07:15:33     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 3 (0x14ef2e000) [pid = 1926] [serial = 5] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:33.247Z] 07:15:33     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (0x124633800) [pid = 1926] [serial = 3] [outer = 0x0] [url = https://example.com/3]
[task 2020-05-30T07:15:33.277Z] 07:15:33     INFO - GECKO(1919) | [Child 1926: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (0x127aa7c10) [pid = 1926] [serial = 4] [outer = 0x0] [url = https://example.com/3]
[task 2020-05-30T07:15:33.317Z] 07:15:33     INFO - GECKO(1919) | [Child 1929: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (0x11006a800) [pid = 1929] [serial = 2] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:33.339Z] 07:15:33     INFO - GECKO(1919) | [Child 1931: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (0x112065800) [pid = 1931] [serial = 2] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:33.676Z] 07:15:33     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 3 (0x14bf2e800) [pid = 1927] [serial = 5] [outer = 0x0] [url = about:blank]
[task 2020-05-30T07:15:33.676Z] 07:15:33     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (0x10e339800) [pid = 1927] [serial = 3] [outer = 0x0] [url = https://example.com/4]
[task 2020-05-30T07:15:33.703Z] 07:15:33     INFO - GECKO(1919) | [Child 1927: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (0x13d378c10) [pid = 1927] [serial = 4] [outer = 0x0] [url = https://example.com/4]
[task 2020-05-30T07:15:35.348Z] 07:15:35     INFO - GECKO(1919) | [Child 1925: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (0x140146000) [pid = 1925] [serial = 6] [outer = 0x0] [url = https://example.com/2]
[task 2020-05-30T07:15:36.221Z] 07:15:36     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-05-30T07:15:36.224Z] 07:15:36     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_undo_close_tabs.js | Uncaught exception - wait for the multiselected tabs to close - timed out after 50 tries.
[task 2020-05-30T07:15:36.224Z] 07:15:36     INFO - Leaving test bound withCloseTabsToTheRight
[task 2020-05-30T07:15:36.256Z] 07:15:36     INFO - GECKO(1919) | 2020-05-30 07:15:36.231 firefox[1919:11245] Persistent UI failed to open file file:///Users/cltbld/Library/Saved%20Application%20State/org.mozilla.nightlydebug.savedState/window_1.data: No such file or directory (2)
[task 2020-05-30T07:15:36.256Z] 07:15:36     INFO - GECKO(1919) | MEMORY STAT vsizeMaxContiguous not supported in this build configuration.
[task 2020-05-30T07:15:36.256Z] 07:15:36     INFO - GECKO(1919) | MEMORY STAT | vsize 7652MB | residentFast 339MB | heapAllocated 113MB
[task 2020-05-30T07:15:36.256Z] 07:15:36     INFO - TEST-OK | browser/base/content/test/tabs/browser_undo_close_tabs.js | took 22169ms
```