Bug: Intermittent browser/base/content/test/general/browser_bug623893.js | went back - Got 2, expected 1
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2021-06-23 20:30:31+00:00
Resolved: 2021-08-03 17:03:27+00:00

**Filed by:** dluca [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=343634569&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/GXoWeZz1SIiIB2tF0eqgNA/runs/0/artifacts/public/logs/live_backing.log

---
```
 INFO - TEST-START | browser/base/content/test/general/browser_bug623893.js
[task 2021-06-23T17:30:51.888Z] 17:30:51     INFO - GECKO(2662) | [Child 2819: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7f9d14aa2c00 == 3 [pid = 2819] [id = 36]
[task 2021-06-23T17:30:51.891Z] 17:30:51     INFO - GECKO(2662) | [Child 2819: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 6 (7f9d14a64580) [pid = 2819] [serial = 82] [outer = 0]
[task 2021-06-23T17:30:51.892Z] 17:30:51     INFO - GECKO(2662) | [Child 2819: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 7 (7f9d14aa5000) [pid = 2819] [serial = 83] [outer = 7f9d14a64580]
[task 2021-06-23T17:30:51.937Z] 17:30:51     INFO - GECKO(2662) | [Child 2829: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 13 (7f8295264ac0) [pid = 2829] [serial = 48] [outer = 0] [url = about:blank]
[task 2021-06-23T17:30:51.939Z] 17:30:51     INFO - GECKO(2662) | [Child 2829: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 12 (7f8276f12e40) [pid = 2829] [serial = 46] [outer = 0] [url = about:blank]
[task 2021-06-23T17:30:51.942Z] 17:30:51     INFO - GECKO(2662) | [Child 2829: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 11 (7f8276f12580) [pid = 2829] [serial = 44] [outer = 0] [url = about:blank]
[task 2021-06-23T17:30:51.944Z] 17:30:51     INFO - GECKO(2662) | [Child 2829: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 10 (7f8276f12040) [pid = 2829] [serial = 38] [outer = 0] [url = about:blank]
[task 2021-06-23T17:30:51.945Z] 17:30:51     INFO - GECKO(2662) | [Child 2829: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 9 (7f8295264e40) [pid = 2829] [serial = 50] [outer = 0] [url = about:blank]
[task 2021-06-23T17:30:51.946Z] 17:30:51     INFO - GECKO(2662) | [Child 2829: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 8 (7f8276f12200) [pid = 2829] [serial = 41] [outer = 0] [url = data:text/plain,nothing but plain text]
[task 2021-06-23T17:30:52.100Z] 17:30:52     INFO - GECKO(2662) | [Child 2819: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 8 (7f9d14aa9400) [pid = 2819] [serial = 84] [outer = 7f9d14a64580]
[task 2021-06-23T17:30:52.519Z] 17:30:52     INFO - GECKO(2662) | [Child 2829: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7f8276f9b800 == 1 [pid = 2829] [id = 20]
[task 2021-06-23T17:30:52.520Z] 17:30:52     INFO - GECKO(2662) | [Child 2829: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 9 (7f8276f12040) [pid = 2829] [serial = 52] [outer = 0]
[task 2021-06-23T17:30:52.520Z] 17:30:52     INFO - GECKO(2662) | [Child 2829: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 10 (7f8276f9e400) [pid = 2829] [serial = 53] [outer = 7f8276f12040]
[task 2021-06-23T17:30:52.586Z] 17:30:52     INFO - GECKO(2662) | [Child 2829: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 11 (7f82781da400) [pid = 2829] [serial = 54] [outer = 7f8276f12040]
[task 2021-06-23T17:30:52.731Z] 17:30:52     INFO - GECKO(2662) | [Child 2890: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7ff317ed8800 == 2 [pid = 2890] [id = 5]
[task 2021-06-23T17:30:52.731Z] 17:30:52     INFO - GECKO(2662) | [Child 2890: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 6 (7ff316d23040) [pid = 2890] [serial = 14] [outer = 0]
[task 2021-06-23T17:30:52.732Z] 17:30:52     INFO - GECKO(2662) | [Child 2890: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 7 (7ff317ed9800) [pid = 2890] [serial = 15] [outer = 7ff316d23040]
[task 2021-06-23T17:30:52.799Z] 17:30:52     INFO - GECKO(2662) | [Child 2890: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 8 (7ff31e8d3800) [pid = 2890] [serial = 16] [outer = 7ff316d23040]
[task 2021-06-23T17:30:52.937Z] 17:30:52     INFO - GECKO(2662) | [Child 3222: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7fb6ebb96400 == 1 [pid = 3222] [id = 1]
[task 2021-06-23T17:30:52.937Z] 17:30:52     INFO - GECKO(2662) | [Child 3222: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 1 (7fb702264c80) [pid = 3222] [serial = 3] [outer = 0]
[task 2021-06-23T17:30:52.939Z] 17:30:52     INFO - GECKO(2662) | [Child 3222: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (7fb6ebb97800) [pid = 3222] [serial = 4] [outer = 7fb702264c80]
[task 2021-06-23T17:30:53.398Z] 17:30:53     INFO - GECKO(2662) | [Child 3222: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (7fb6ebb9d800) [pid = 3222] [serial = 5] [outer = 7fb702264c80]
[task 2021-06-23T17:30:53.552Z] 17:30:53     INFO - GECKO(2662) | [Child 2890: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7ff317ed7400 == 1 [pid = 2890] [id = 4] [url = about:blank]
[task 2021-06-23T17:30:53.588Z] 17:30:53     INFO - GECKO(2662) | [Child 3266: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7fbc43096400 == 1 [pid = 3266] [id = 1]
[task 2021-06-23T17:30:53.589Z] 17:30:53     INFO - GECKO(2662) | [Child 3266: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 1 (7fbc59764c80) [pid = 3266] [serial = 3] [outer = 0]
[task 2021-06-23T17:30:53.589Z] 17:30:53     INFO - GECKO(2662) | [Child 3266: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (7fbc43097400) [pid = 3266] [serial = 4] [outer = 7fbc59764c80]
[task 2021-06-23T17:30:53.653Z] 17:30:53     INFO - GECKO(2662) | [Child 2890: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 7 (7ff334f64e40) [pid = 2890] [serial = 11] [outer = 0] [url = about:blank]
[task 2021-06-23T17:30:53.655Z] 17:30:53     INFO - GECKO(2662) | [Child 2890: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 6 (7ff334f64c80) [pid = 2890] [serial = 9] [outer = 0] [url = about:blank]
[task 2021-06-23T17:30:53.797Z] 17:30:53     INFO - GECKO(2662) | [Child 3266: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (7fbc4309c800) [pid = 3266] [serial = 5] [outer = 7fbc59764c80]
[task 2021-06-23T17:30:54.057Z] 17:30:54     INFO - GECKO(2662) | [Child 3266: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 4 (7fbc3c6d2000) [pid = 3266] [serial = 6] [outer = 7fbc59764c80]
[task 2021-06-23T17:30:54.120Z] 17:30:54     INFO - TEST-INFO | started process screentopng
[task 2021-06-23T17:30:54.447Z] 17:30:54     INFO - TEST-INFO | screentopng: exit 0
[task 2021-06-23T17:30:54.448Z] 17:30:54     INFO - Buffered messages logged at 17:30:51
[task 2021-06-23T17:30:54.448Z] 17:30:54     INFO - Entering test bound test
[task 2021-06-23T17:30:54.449Z] 17:30:54     INFO - Buffered messages logged at 17:30:53
[task 2021-06-23T17:30:54.450Z] 17:30:54     INFO - TEST-PASS | browser/base/content/test/general/browser_bug623893.js | maintained the original index - 
[task 2021-06-23T17:30:54.451Z] 17:30:54     INFO - Buffered messages finished
[task 2021-06-23T17:30:54.455Z] 17:30:54     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/general/browser_bug623893.js | went back - Got 2, expected 1
[task 2021-06-23T17:30:54.456Z] 17:30:54     INFO - Stack trace:
[task 2021-06-23T17:30:54.457Z] 17:30:54     INFO - chrome://mochikit/content/browser-test.js:test_is:1359
[task 2021-06-23T17:30:54.458Z] 17:30:54     INFO - chrome://mochitests/content/browser/browser/base/content/test/general/browser_bug623893.js:duplicate:43
[task 2021-06-23T17:30:54.459Z] 17:30:54     INFO - GECKO(2662) | [Child 3222: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7fb6e51cfc00 == 2 [pid = 3222] [id = 2]
[task 2021-06-23T17:30:54.460Z] 17:30:54     INFO - GECKO(2662) | [Child 3222: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 4 (7fb6e51c2040) [pid = 3222] [serial = 6] [outer = 0]
[task 2021-06-23T17:30:54.460Z] 17:30:54     INFO - GECKO(2662) | [Child 3222: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 5 (7fb6e51d0c00) [pid = 3222] [serial = 7] [outer = 7fb6e51c2040]
[task 2021-06-23T17:30:54.528Z] 17:30:54     INFO - GECKO(2662) | [Child 3222: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 6 (7fb6e51d4800) [pid = 3222] [serial = 8] [outer = 7fb6e51c2040]
[task 2021-06-23T17:30:54.652Z] 17:30:54     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-06-23T17:30:54.653Z] 17:30:54     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/general/browser_bug623893.js | went forward - Got 2, expected 3
[task 2021-06-23T17:30:54.653Z] 17:30:54     INFO - Stack trace:
[task 2021-06-23T17:30:54.653Z] 17:30:54     INFO - chrome://mochikit/content/browser-test.js:test_is:1359
[task 2021-06-23T17:30:54.653Z] 17:30:54     INFO - chrome://mochitests/content/browser/browser/base/content/test/general/browser_bug623893.js:duplicate:43
[task 2021-06-23T17:30:54.783Z] 17:30:54     INFO - Leaving test bound test
[task 2021-06-23T17:30:54.924Z] 17:30:54     INFO - GECKO(2662) | MEMORY STAT | vsize 3435MB | residentFast 534MB | heapAllocated 243MB
[task 2021-06-23T17:30:54.926Z] 17:30:54     INFO - TEST-OK | browser/base/content/test/general/browser_bug623893.js | took 3057ms
[task 2021-06-23T17:30:54.942Z] 17:30:54     INFO - GECKO(2662) | [Child 2819: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7f9d14aa6000 == 4 [pid = 2819] [id = 37]
[task 2021-06-23T17:30:54.942Z] 17:30:54     INFO - GECKO(2662) | [Child 2819: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 9 (7f9d14a64740) [pid = 2819] [serial = 85] [outer = 0]
[task 2021-06-23T17:30:54.942Z] 17:30:54     INFO - GECKO(2662) | [Child 2819: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 10 (7f9d14aa7000) [pid = 2819] [serial = 86] [outer = 7f9d14a64740]
[task 2021-06-23T17:30:54.985Z] 17:30:54     INFO - checking window state
[task 2021-06-23T17:30:55.034Z] 17:30:55     INFO - TEST-START | browser/base/content/test/general/browser_bug624734.js
```