Bug: Intermittent [Tier2][perma] toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors.js | Uncaught exception - at chrome://contetest/browser/browser_ext_themes_ntp_colors.js:36 - TypeError: Window.getComputedStyle: Argument 1 is not an
Status: RESOLVED
Priority: P1
Resolution: DUPLICATE
Created: 2020-04-22 01:12:38+00:00
Resolved: 2020-09-21 06:03:51+00:00

**Filed by:** csabou [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer.html#?job_id=298728802&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Q0FkKoX8R5-a3_QgaWWVww/runs/0/artifacts/public/logs/live_backing.log

---

[task 2020-04-22T00:29:41.375Z] 00:29:41     INFO - TEST-PASS | toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors.js | New tab page should not have lwt-newtab attribute - true == true - 
[task 2020-04-22T00:29:41.375Z] 00:29:41     INFO - TEST-PASS | toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors.js | New tab page should not have lwt-newtab-brighttext attribute - true == true - 
[task 2020-04-22T00:29:41.375Z] 00:29:41     INFO - Buffered messages finished
[task 2020-04-22T00:29:41.375Z] 00:29:41     INFO - TEST-UNEXPECTED-FAIL | toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors.js | Uncaught exception - at chrome://mochitests/content/browser/toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors.js:36 - TypeError: Window.getComputedStyle: Argument 1 is not an object.
[task 2020-04-22T00:29:41.375Z] 00:29:41     INFO - Stack trace:
[task 2020-04-22T00:29:41.375Z] 00:29:41     INFO - @chrome://mochitests/content/browser/toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors.js:36:32
[task 2020-04-22T00:29:41.375Z] 00:29:41     INFO - execute@resource://specialpowers/SpecialPowersSandbox.jsm:141:12
[task 2020-04-22T00:29:41.375Z] 00:29:41     INFO - _spawnTask@resource://specialpowers/SpecialPowersChild.jsm:1729:15
[task 2020-04-22T00:29:41.375Z] 00:29:41     INFO - receiveMessage@resource://specialpowers/SpecialPowersChild.jsm:281:21
[task 2020-04-22T00:29:41.375Z] 00:29:41     INFO - JSWindowActor query*receiveMessage@resource://specialpowers/SpecialPowersParent.jsm:1113:12
[task 2020-04-22T00:29:41.375Z] 00:29:41     INFO - JSWindowActor query*spawn@resource://specialpowers/SpecialPowersChild.jsm:1684:17
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - test_ntp_theme@chrome://mochitests/content/browser/toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors.js:19:67
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - test_support_ntp_colors/<@chrome://mochitests/content/browser/toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors.js:130:13
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - withNewTab@resource://testing-common/BrowserTestUtils.jsm:146:24
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - async*test_support_ntp_colors@chrome://mochitests/content/browser/toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors.js:129:28
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - Async*Tester_execTest/<@chrome://mochikit/content/browser-test.js:1039:34
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - Tester_execTest@chrome://mochikit/content/browser-test.js:1074:11
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - nextTest/<@chrome://mochikit/content/browser-test.js:904:14
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - SimpleTest.waitForFocus/waitForFocusInner/focusedOrLoaded/<@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:918:23
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - Leaving test bound test_support_ntp_colors
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - GECKO(2563) | MEMORY STAT | vsize 7790MB | residentFast 420MB | heapAllocated 194MB
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - TEST-OK | toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors.js | took 1591ms
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - TEST-UNEXPECTED-FAIL | toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors.js | Found an unexpected tab at the end of test run: about:welcome - 
[task 2020-04-22T00:29:41.376Z] 00:29:41     INFO - checking window state
[task 2020-04-22T00:29:41.377Z] 00:29:41     INFO - TEST-START | toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors_perwindow.js
[task 2020-04-22T00:29:42.917Z] 00:29:42     INFO - GECKO(2563) | JavaScript error: chrome://mochitests/content/browser/toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors_perwindow.js, line 44: TypeError: Window.getComputedStyle: Argument 1 is not an object.
[task 2020-04-22T00:29:52.751Z] 00:29:52     INFO - GECKO(2563) | 2020-04-22 00:29:52.724 firefox[2563:37548] Persistent UI failed to open file file:///Users/cltbld/Library/Saved%20Application%20State/org.mozilla.nightly.savedState/window_1.data: No such file or directory (2)
[task 2020-04-22T00:30:26.264Z] 00:30:26     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-04-22T00:30:26.264Z] 00:30:26     INFO - Buffered messages logged at 00:29:41
[task 2020-04-22T00:30:26.264Z] 00:30:26     INFO - Entering test bound test_per_window_ntp_theme
[task 2020-04-22T00:30:26.264Z] 00:30:26     INFO - Extension loaded
[task 2020-04-22T00:30:26.264Z] 00:30:26     INFO - Console message: OpenGL compositor Initialized Succesfully.
[task 2020-04-22T00:30:26.264Z] 00:30:26     INFO - Version: 2.1 INTEL-12.9.22
[task 2020-04-22T00:30:26.264Z] 00:30:26     INFO - Vendor: Intel Inc.
[task 2020-04-22T00:30:26.264Z] 00:30:26     INFO - Renderer: Intel Iris OpenGL Engine
[task 2020-04-22T00:30:26.264Z] 00:30:26     INFO - FBO Texture Target: TEXTURE_2D
[task 2020-04-22T00:30:26.265Z] 00:30:26     INFO - Test that single window update works
[task 2020-04-22T00:30:26.265Z] 00:30:26     INFO - Opening url: about:newtab
[task 2020-04-22T00:30:26.265Z] 00:30:26     INFO - Buffered messages logged at 00:29:42
[task 2020-04-22T00:30:26.265Z] 00:30:26     INFO - TEST-PASS | toolkit/components/extensions/test/browser/browser_ext_themes_ntp_colors_perwindow.js | New tab page should have lwt-newtab attribute - true == true -