Bug: Intermittent browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Found a tab after previous test timed out: about:blank | Test timed out
Status: RESOLVED
Priority: P5
Resolution: DUPLICATE
Created: 2021-09-14 02:57:12+00:00
Resolved: 2022-07-27 18:42:43+00:00

**Filed by:** mlaza [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=351457416&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/KcTrDopIRT-SaXbcCDK4XA/runs/1/artifacts/public/logs/live_backing.log

---
```
[task 2021-09-14T02:01:17.602Z] 02:01:17     INFO - TEST-START | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js
[task 2021-09-14T02:01:18.690Z] 02:01:18     INFO - GECKO(6216) | console.warn: AboutWelcomeParent: Not handling AWPage:TELEMETRY_EVENT because the browser doesn't exist.
[task 2021-09-14T02:01:20.457Z] 02:01:20     INFO - GECKO(6216) | JavaScript error: resource://activity-stream/aboutwelcome/aboutwelcome.bundle.js, line 222: TypeError: window.AWGetFeatureConfig is not a function
[task 2021-09-14T02:02:02.610Z] 02:02:02     INFO - TEST-INFO | started process screentopng
[task 2021-09-14T02:02:02.829Z] 02:02:02     INFO - TEST-INFO | screentopng: exit 0
[task 2021-09-14T02:02:02.830Z] 02:02:02     INFO - Buffered messages logged at 02:01:17
[task 2021-09-14T02:02:02.831Z] 02:02:02     INFO - Entering test bound setup
[task 2021-09-14T02:02:02.831Z] 02:02:02     INFO - Leaving test bound setup
[task 2021-09-14T02:02:02.831Z] 02:02:02     INFO - Entering test bound activity_stream_in_privileged_content_process
[task 2021-09-14T02:02:02.831Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Ensures that tab runs in the privilegedabout content process. - 
[task 2021-09-14T02:02:02.832Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Parent and child process should agree on the remote type. - 
[task 2021-09-14T02:02:02.832Z] 02:02:02     INFO - Buffered messages logged at 02:01:18
[task 2021-09-14T02:02:02.833Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Check that about:newtab tabs are in the same privileged about: content process. - 
[task 2021-09-14T02:02:02.835Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Check that about:newtab tabs are in the same privileged about: content process. - 
[task 2021-09-14T02:02:02.837Z] 02:02:02     INFO - Console message: [JavaScript Error: "can't access property "createInstance", Cc[("@mozilla.org/profile/migrator;1?app=browser&type=" + aKey)] is undefined" {file: "resource:///modules/MigrationUtils.jsm" line: 792}]
[task 2021-09-14T02:02:02.837Z] 02:02:02     INFO - MU_getMigrator@resource:///modules/MigrationUtils.jsm:792:1
[task 2021-09-14T02:02:02.837Z] 02:02:02     INFO - getImportableSites@resource:///actors/AboutWelcomeParent.jsm:62:43
[task 2021-09-14T02:02:02.837Z] 02:02:02     INFO - 
[task 2021-09-14T02:02:02.838Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Check that about:newtab tabs are in the same privileged about: content process. - 
[task 2021-09-14T02:02:02.838Z] 02:02:02     INFO - Buffered messages logged at 02:01:19
[task 2021-09-14T02:02:02.838Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Check that about:newtab tabs are in the same privileged about: content process. - 
[task 2021-09-14T02:02:02.840Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Check that about:newtab tabs are in the same privileged about: content process. - 
[task 2021-09-14T02:02:02.840Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Check that about:newtab tabs are in the same privileged about: content process. - 
[task 2021-09-14T02:02:02.841Z] 02:02:02     INFO - Buffered messages logged at 02:01:20
[task 2021-09-14T02:02:02.842Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Check that about:newtab tabs are in the same privileged about: content process. - 
[task 2021-09-14T02:02:02.842Z] 02:02:02     INFO - Console message: [JavaScript Error: "TypeError: window.AWGetFeatureConfig is not a function" {file: "resource://activity-stream/aboutwelcome/aboutwelcome.bundle.js" line: 222}]
[task 2021-09-14T02:02:02.843Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Check that about:newtab tabs are in the same privileged about: content process. - 
[task 2021-09-14T02:02:02.844Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Check that about:newtab tabs are in the same privileged about: content process. - 
[task 2021-09-14T02:02:02.844Z] 02:02:02     INFO - Buffered messages logged at 02:01:21
[task 2021-09-14T02:02:02.845Z] 02:02:02     INFO - Leaving test bound activity_stream_in_privileged_content_process
[task 2021-09-14T02:02:02.846Z] 02:02:02     INFO - Entering test bound process_switching_through_loading_in_the_same_tab
[task 2021-09-14T02:02:02.846Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Ensures that tab runs in the web content process. - 
[task 2021-09-14T02:02:02.847Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Parent and child process should agree on the remote type. - 
[task 2021-09-14T02:02:02.847Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Ensures that tab runs in the privilegedabout content process. - 
[task 2021-09-14T02:02:02.848Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Parent and child process should agree on the remote type. - 
[task 2021-09-14T02:02:02.849Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Ensures that tab runs in the web content process. - 
[task 2021-09-14T02:02:02.849Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Parent and child process should agree on the remote type. - 
[task 2021-09-14T02:02:02.850Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Ensures that tab runs in the web content process. - 
[task 2021-09-14T02:02:02.851Z] 02:02:02     INFO - TEST-PASS | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Parent and child process should agree on the remote type. - 
[task 2021-09-14T02:02:02.851Z] 02:02:02     INFO - Console message: [JavaScript Error: "remote browser crashed while on about:blank
[task 2021-09-14T02:02:02.851Z] 02:02:02     INFO - " {file: "chrome://mochikit/content/mochitest-e10s-utils.js" line: 10}]
[task 2021-09-14T02:02:02.852Z] 02:02:02     INFO - e10s_init/<@chrome://mochikit/content/mochitest-e10s-utils.js:10:10
[task 2021-09-14T02:02:02.852Z] 02:02:02     INFO - 
[task 2021-09-14T02:02:02.852Z] 02:02:02     INFO - Buffered messages finished
[task 2021-09-14T02:02:02.853Z] 02:02:02     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Test timed out - 
[task 2021-09-14T02:02:02.854Z] 02:02:02     INFO - GECKO(6216) | MEMORY STAT | vsize 4022MB | residentFast 426MB | heapAllocated 237MB
[task 2021-09-14T02:02:02.854Z] 02:02:02     INFO - TEST-OK | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | took 45013ms
[task 2021-09-14T02:02:02.855Z] 02:02:02     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-09-14T02:02:02.855Z] 02:02:02     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js | Found a tab after previous test timed out: about:blank - 
[task 2021-09-14T02:02:02.856Z] 02:02:02    ERROR - GECKO(6216) | TEST-UNEXPECTED-FAIL | unknown test url | uncaught exception - TypeError: can't access property "hasLayers", initialBrowser.frameLoader.remoteTab is null at AsyncTabSwitcher@resource:///modules/AsyncTabSwitcher.jsm:168:1
[task 2021-09-14T02:02:02.857Z] 02:02:02     INFO - GECKO(6216) | _getSwitcher@chrome://browser/content/tabbrowser.js:5136:26
[task 2021-09-14T02:02:02.857Z] 02:02:02     INFO - GECKO(6216) | updateCurrentBrowser@chrome://browser/content/tabbrowser.js:1066:16
[task 2021-09-14T02:02:02.858Z] 02:02:02     INFO - GECKO(6216) | _setupEventListeners/<@chrome://browser/content/tabbrowser.js:5607:16
[task 2021-09-14T02:02:02.858Z] 02:02:02     INFO - GECKO(6216) | set selectedIndex@chrome://global/content/elements/tabbox.js:202:14
[task 2021-09-14T02:02:02.859Z] 02:02:02     INFO - GECKO(6216) | set selectedPanel@chrome://global/content/elements/tabbox.js:220:7
[task 2021-09-14T02:02:02.859Z] 02:02:02     INFO - GECKO(6216) | set selectedIndex@chrome://global/content/elements/tabbox.js:544:11
[task 2021-09-14T02:02:02.860Z] 02:02:02     INFO - GECKO(6216) | set selectedItem@chrome://global/content/elements/tabbox.js:563:35
[task 2021-09-14T02:02:02.860Z] 02:02:02     INFO - GECKO(6216) | set selectedTab@chrome://global/content/elements/tabbox.js:85:11
[task 2021-09-14T02:02:02.861Z] 02:02:02     INFO - GECKO(6216) | set selectedTab@chrome://browser/content/tabbrowser.js:311:7
[task 2021-09-14T02:02:02.861Z] 02:02:02     INFO - GECKO(6216) | _blurTab@chrome://browser/content/tabbrowser.js:4082:31
[task 2021-09-14T02:02:02.862Z] 02:02:02     INFO - GECKO(6216) | _beginRemoveTab@chrome://browser/content/tabbrowser.js:3724:14
[task 2021-09-14T02:02:02.862Z] 02:02:02     INFO - GECKO(6216) | removeTab@chrome://browser/content/tabbrowser.js:3592:15
[task 2021-09-14T02:02:02.863Z] 02:02:02     INFO - GECKO(6216) | Tester_waitForWindowsState@chrome://mochikit/content/browser-test.js:412:18
[task 2021-09-14T02:02:02.864Z] 02:02:02     INFO - GECKO(6216) | nextTest@chrome://mochikit/content/browser-test.js:826:10
[task 2021-09-14T02:02:02.864Z] 02:02:02     INFO - GECKO(6216) | JavaScript error: resource:///modules/AsyncTabSwitcher.jsm, line 168: TypeError: can't access property "hasLayers", initialBrowser.frameLoader.remoteTab is null
[task 2021-09-14T02:02:02.865Z] 02:02:02     INFO - GECKO(6216) | JavaScript error: chrome://browser/content/parent/ext-browser.js, line 508: TypeError: currentTab.linkedBrowser is null
[task 2021-09-14T02:02:02.866Z] 02:02:02     INFO - Console message: [JavaScript Error: "TypeError: can't access property "hasLayers", initialBrowser.frameLoader.remoteTab is null" {file: "resource:///modules/AsyncTabSwitcher.jsm" line: 168}]
[task 2021-09-14T02:02:02.866Z] 02:02:02     INFO - AsyncTabSwitcher@resource:///modules/AsyncTabSwitcher.jsm:168:1
[task 2021-09-14T02:02:02.867Z] 02:02:02     INFO - _getSwitcher@chrome://browser/content/tabbrowser.js:5136:26
[task 2021-09-14T02:02:02.867Z] 02:02:02     INFO - updateCurrentBrowser@chrome://browser/content/tabbrowser.js:1066:16
[task 2021-09-14T02:02:02.867Z] 02:02:02     INFO - _setupEventListeners/<@chrome://browser/content/tabbrowser.js:5607:16
[task 2021-09-14T02:02:02.867Z] 02:02:02     INFO - set selectedIndex@chrome://global/content/elements/tabbox.js:202:14
[task 2021-09-14T02:02:02.868Z] 02:02:02     INFO - set selectedPanel@chrome://global/content/elements/tabbox.js:220:7
[task 2021-09-14T02:02:02.868Z] 02:02:02     INFO - set selectedIndex@chrome://global/content/elements/tabbox.js:544:11
[task 2021-09-14T02:02:02.868Z] 02:02:02     INFO - set selectedItem@chrome://global/content/elements/tabbox.js:563:35
[task 2021-09-14T02:02:02.868Z] 02:02:02     INFO - set selectedTab@chrome://global/content/elements/tabbox.js:85:11
[task 2021-09-14T02:02:02.868Z] 02:02:02     INFO - set selectedTab@chrome://browser/content/tabbrowser.js:311:7
[task 2021-09-14T02:02:02.869Z] 02:02:02     INFO - _blurTab@chrome://browser/content/tabbrowser.js:4082:31
[task 2021-09-14T02:02:02.869Z] 02:02:02     INFO - _beginRemoveTab@chrome://browser/content/tabbrowser.js:3724:14
[task 2021-09-14T02:02:02.869Z] 02:02:02     INFO - removeTab@chrome://browser/content/tabbrowser.js:3592:15
[task 2021-09-14T02:02:02.869Z] 02:02:02     INFO - Tester_waitForWindowsState@chrome://mochikit/content/browser-test.js:412:18
[task 2021-09-14T02:02:02.869Z] 02:02:02     INFO - nextTest@chrome://mochikit/content/browser-test.js:826:10
[task 2021-09-14T02:02:02.870Z] 02:02:02     INFO - 
[task 2021-09-14T02:02:02.870Z] 02:02:02     INFO - 
[task 2021-09-14T02:02:02.871Z] 02:02:02     INFO - Console message: [JavaScript Error: "TypeError: currentTab.linkedBrowser is null" {file: "chrome://browser/content/parent/ext-browser.js" line: 508}]
[task 2021-09-14T02:02:02.871Z] 02:02:02     INFO - handleEvent@chrome://browser/content/parent/ext-browser.js:508:35
[task 2021-09-14T02:02:02.871Z] 02:02:02     INFO - _fireTabOpen@chrome://browser/content/tabbrowser.js:3292:11
[task 2021-09-14T02:02:02.871Z] 02:02:02     INFO - addTab@chrome://browser/content/tabbrowser.js:2829:14
[task 2021-09-14T02:02:02.872Z] 02:02:02     INFO - Tester_waitForWindowsState@chrome://mochikit/content/browser-test.js:418:16
[task 2021-09-14T02:02:02.872Z] 02:02:02     INFO - nextTest@chrome://mochikit/content/browser-test.js:826:10
[task 2021-09-14T02:02:02.872Z] 02:02:02     INFO - 
[task 2021-09-14T02:02:02.873Z] 02:02:02     INFO - GECKO(6216) | Assertion failure
[task 2021-09-14T02:02:02.873Z] 02:02:02     INFO - GECKO(6216) | assert@resource:///modules/AsyncTabSwitcher.jsm:499:36
[task 2021-09-14T02:02:02.874Z] 02:02:02     INFO - GECKO(6216) | preActions@resource:///modules/AsyncTabSwitcher.jsm:566:10
[task 2021-09-14T02:02:02.874Z] 02:02:02     INFO - GECKO(6216) | handleEvent@resource:///modules/AsyncTabSwitcher.jsm:1077:12
[task 2021-09-14T02:02:02.875Z] 02:02:02     INFO - GECKO(6216) | Assertion failure
[task 2021-09-14T02:02:02.875Z] 02:02:02     INFO - GECKO(6216) | assert@resource:///modules/AsyncTabSwitcher.jsm:499:36
[task 2021-09-14T02:02:02.876Z] 02:02:02     INFO - GECKO(6216) | preActions@resource:///modules/AsyncTabSwitcher.jsm:567:10
[task 2021-09-14T02:02:02.876Z] 02:02:02     INFO - GECKO(6216) | handleEvent@resource:///modules/AsyncTabSwitcher.jsm:1077:12
[task 2021-09-14T02:02:02.877Z] 02:02:02     INFO - GECKO(6216) | JavaScript error: resource:///modules/AsyncTabSwitcher.jsm, line 624: TypeError: can't access property "isRemoteBrowser", this.requestedTab.linkedBrowser is null
[task 2021-09-14T02:02:02.877Z] 02:02:02     INFO - GECKO(6216) | Assertion failure
[task 2021-09-14T02:02:02.878Z] 02:02:02     INFO - GECKO(6216) | assert@resource:///modules/AsyncTabSwitcher.jsm:499:36
[task 2021-09-14T02:02:02.878Z] 02:02:02     INFO - GECKO(6216) | preActions@resource:///modules/AsyncTabSwitcher.jsm:566:10
[task 2021-09-14T02:02:02.879Z] 02:02:02     INFO - GECKO(6216) | handleEvent@resource:///modules/AsyncTabSwitcher.jsm:1077:12
[task 2021-09-14T02:02:02.879Z] 02:02:02     INFO - GECKO(6216) | Assertion failure
[task 2021-09-14T02:02:02.880Z] 02:02:02     INFO - GECKO(6216) | assert@resource:///modules/AsyncTabSwitcher.jsm:499:36
[task 2021-09-14T02:02:02.880Z] 02:02:02     INFO - GECKO(6216) | preActions@resource:///modules/AsyncTabSwitcher.jsm:567:10
[task 2021-09-14T02:02:02.881Z] 02:02:02     INFO - GECKO(6216) | handleEvent@resource:///modules/AsyncTabSwitcher.jsm:1077:12
[task 2021-09-14T02:02:02.882Z] 02:02:02     INFO - GECKO(6216) | JavaScript error: resource:///modules/AsyncTabSwitcher.jsm, line 624: TypeError: can't access property "isRemoteBrowser", this.requestedTab.linkedBrowser is null
[task 2021-09-14T02:02:02.882Z] 02:02:02     INFO - GECKO(6216) | JavaScript error: resource://gre/modules/RemoteWebNavigation.jsm, line 139: TypeError: can't access property "stop", this._browser.browsingContext is null
[task 2021-09-14T02:02:02.883Z] 02:02:02     INFO - Console message: [JavaScript Error: "TypeError: can't access property "isRemoteBrowser", this.requestedTab.linkedBrowser is null" {file: "resource:///modules/AsyncTabSwitcher.jsm" line: 624}]
[task 2021-09-14T02:02:02.883Z] 02:02:02     INFO - postActions@resource:///modules/AsyncTabSwitcher.jsm:624:9
[task 2021-09-14T02:02:02.883Z] 02:02:02     INFO - handleEvent@resource:///modules/AsyncTabSwitcher.jsm:1116:12
[task 2021-09-14T02:02:02.884Z] 02:02:02     INFO - 
[task 2021-09-14T02:02:02.885Z] 02:02:02     INFO - Console message: [JavaScript Error: "TypeError: can't access property "isRemoteBrowser", this.requestedTab.linkedBrowser is null" {file: "resource:///modules/AsyncTabSwitcher.jsm" line: 624}]
[task 2021-09-14T02:02:02.885Z] 02:02:02     INFO - postActions@resource:///modules/AsyncTabSwitcher.jsm:624:9
[task 2021-09-14T02:02:02.885Z] 02:02:02     INFO - handleEvent@resource:///modules/AsyncTabSwitcher.jsm:1116:12
[task 2021-09-14T02:02:02.885Z] 02:02:02     INFO - 
[task 2021-09-14T02:02:02.886Z] 02:02:02     INFO - Console message: [JavaScript Error: "TypeError: can't access property "stop", this._browser.browsingContext is null" {file: "resource://gre/modules/RemoteWebNavigation.jsm" line: 139}]
[task 2021-09-14T02:07:14.235Z] 02:07:14     INFO - GECKO(6216) | 1631585234234	addons.xpi	ERROR	System addon update list error Error: got node name: html, expected: updates
[task 2021-09-14T02:07:14.237Z] 02:07:14     INFO - Console message: [JavaScript Error: "1631585234234	addons.xpi	ERROR	System addon update list error Error: got node name: html, expected: updates" {file: "resource://gre/modules/Log.jsm" line: 723}]
[task 2021-09-14T02:07:14.238Z] 02:07:14     INFO - append@resource://gre/modules/Log.jsm:723:12
[task 2021-09-14T02:07:14.238Z] 02:07:14     INFO - log@resource://gre/modules/Log.jsm:379:16
[task 2021-09-14T02:07:14.238Z] 02:07:14     INFO - error@resource://gre/modules/Log.jsm:387:10
[task 2021-09-14T02:07:14.238Z] 02:07:14     INFO - updateSystemAddons/res<@resource://gre/modules/addons/XPIInstall.jsm:4042:25
[task 2021-09-14T02:07:14.238Z] 02:07:14     INFO - 
[task 2021-09-14T02:13:24.244Z] 02:13:24     INFO - Buffered messages finished
[task 2021-09-14T02:13:24.246Z] 02:13:24    ERROR - TEST-UNEXPECTED-TIMEOUT | browser/base/content/test/tabs/browser_new_tab_in_privilegedabout_process_pref.js (finished) | application timed out after 370 seconds with no output
[task 2021-09-14T02:13:24.247Z] 02:13:24    ERROR - Force-terminating active process(es).
[task 2021-09-14T02:13:24.248Z] 02:13:24     INFO - Determining child pids from psutil...
[task 2021-09-14T02:13:24.260Z] 02:13:24     INFO - [6307, 6362, 6386, 6596, 9536, 9541, 9552, 9599]
```