Bug: Intermittent browser/components/customizableui/test/browser_913972_currentset_overflow.js | Uncaught exception - Navbar has a overflowing attribute - timed out after 50 tries.
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2020-10-23 19:06:03+00:00
Resolved: 2021-09-28 17:03:44+00:00

**Filed by:** btara [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer.html#?job_id=319577966&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/HqbjntSGRWu9VwJDPTRwzQ/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2020-10-23T18:14:26.409Z] 18:14:26     INFO - TEST-START | browser/components/customizableui/test/browser_913972_currentset_overflow.js
[task 2020-10-23T18:14:31.629Z] 18:14:31     INFO - TEST-INFO | started process screenshot
[task 2020-10-23T18:14:31.694Z] 18:14:31     INFO - TEST-INFO | screenshot: exit 0
[task 2020-10-23T18:14:31.694Z] 18:14:31     INFO - Buffered messages logged at 18:14:26
[task 2020-10-23T18:14:31.694Z] 18:14:31     INFO - Entering test bound 
[task 2020-10-23T18:14:31.694Z] 18:14:31     INFO - TEST-PASS | browser/components/customizableui/test/browser_913972_currentset_overflow.js | Should start with a non-overflowing toolbar. - 
[task 2020-10-23T18:14:31.694Z] 18:14:31     INFO - TEST-PASS | browser/components/customizableui/test/browser_913972_currentset_overflow.js | Should start in default state. - 
[task 2020-10-23T18:14:31.694Z] 18:14:31     INFO - Buffered messages finished
[task 2020-10-23T18:14:31.695Z] 18:14:31     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_913972_currentset_overflow.js | Uncaught exception - Navbar has a overflowing attribute - timed out after 50 tries.
[task 2020-10-23T18:14:31.695Z] 18:14:31     INFO - Leaving test bound 
[task 2020-10-23T18:14:31.695Z] 18:14:31     INFO - Entering test bound 
[task 2020-10-23T18:14:31.695Z] 18:14:31     INFO - TEST-PASS | browser/components/customizableui/test/browser_913972_currentset_overflow.js | Should start in default state. - 
[task 2020-10-23T18:14:31.695Z] 18:14:31     INFO - TEST-PASS | browser/components/customizableui/test/browser_913972_currentset_overflow.js | Should be in default state in customization mode. - 
[task 2020-10-23T18:14:31.724Z] 18:14:31     INFO - TEST-PASS | browser/components/customizableui/test/browser_913972_currentset_overflow.js | Should be in default state after customization mode. - 
[task 2020-10-23T18:14:31.724Z] 18:14:31     INFO - Leaving test bound 
[task 2020-10-23T18:14:31.784Z] 18:14:31     INFO - GECKO(7892) | MEMORY STAT | vsize 2104334MB | vsizeMaxContiguous 66019120MB | residentFast 320MB | heapAllocated 110MB
[task 2020-10-23T18:14:31.784Z] 18:14:31     INFO - TEST-OK | browser/components/customizableui/test/browser_913972_currentset_overflow.js | took 5373ms
[task 2020-10-23T18:14:31.802Z] 18:14:31     INFO - checking window state
[task 2020-10-23T18:14:31.802Z] 18:14:31     INFO - TEST-START | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js
[task 2020-10-23T18:14:37.007Z] 18:14:37     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:14:37.007Z] 18:14:37     INFO - Buffered messages logged at 18:14:31
[task 2020-10-23T18:14:37.007Z] 18:14:37     INFO - Entering test bound 
[task 2020-10-23T18:14:37.008Z] 18:14:37     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Should start with a non-overflowing toolbar. - 
[task 2020-10-23T18:14:37.008Z] 18:14:37     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Should start in default state. - 
[task 2020-10-23T18:14:37.008Z] 18:14:37     INFO - Buffered messages finished
[task 2020-10-23T18:14:37.008Z] 18:14:37     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Uncaught exception - undefined - timed out after 50 tries.
[task 2020-10-23T18:14:37.008Z] 18:14:37     INFO - Leaving test bound 
[task 2020-10-23T18:14:37.008Z] 18:14:37     INFO - Entering test bound 
[task 2020-10-23T18:14:37.009Z] 18:14:37     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Should start with a non-overflowing toolbar. - 
[task 2020-10-23T18:14:37.011Z] 18:14:37     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Should start in default state. - 
[task 2020-10-23T18:14:37.013Z] 18:14:37     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Should still have a non-overflowing toolbar. - 
[task 2020-10-23T18:14:42.208Z] 18:14:42     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:14:42.208Z] 18:14:42     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Uncaught exception - undefined - timed out after 50 tries.
[task 2020-10-23T18:14:42.208Z] 18:14:42     INFO - Leaving test bound 
[task 2020-10-23T18:14:42.208Z] 18:14:42     INFO - Entering test bound 
[task 2020-10-23T18:14:42.208Z] 18:14:42     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Should start with a non-overflowing toolbar. - 
[task 2020-10-23T18:14:42.208Z] 18:14:42     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:14:42.208Z] 18:14:42     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Should start in default state. - 
[task 2020-10-23T18:14:42.208Z] 18:14:42     INFO - Stack trace:
[task 2020-10-23T18:14:42.208Z] 18:14:42     INFO - chrome://mochikit/content/browser-test.js:test_ok:1304
[task 2020-10-23T18:14:42.208Z] 18:14:42     INFO - chrome://mochitests/content/browser/browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js:null:181
[task 2020-10-23T18:14:42.208Z] 18:14:42     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest/<:1069
[task 2020-10-23T18:14:46.369Z] 18:14:46     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Should have an overflowing toolbar. - 
[task 2020-10-23T18:14:46.369Z] 18:14:46     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Sidebar button should no longer be in the navbar - 
[task 2020-10-23T18:14:46.369Z] 18:14:46     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Sidebar button should be overflowing - 
[task 2020-10-23T18:14:46.369Z] 18:14:46     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Sidebar button should have overflowedItem class - 
[task 2020-10-23T18:14:46.369Z] 18:14:46     INFO - GECKO(7892) | console.error: CustomizableUI:
[task 2020-10-23T18:14:46.370Z] 18:14:46     INFO - GECKO(7892) |   Could not localize property 'test-createWidget-overflow.tooltiptext'.
[task 2020-10-23T18:14:46.370Z] 18:14:46     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Test button should be overflowing - 
[task 2020-10-23T18:14:46.370Z] 18:14:46     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Test button should have overflowedItem class - 
[task 2020-10-23T18:14:46.370Z] 18:14:46     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Test button should be gone - 
[task 2020-10-23T18:14:46.371Z] 18:14:46     INFO - GECKO(7892) | console.error: CustomizableUI:
[task 2020-10-23T18:14:46.371Z] 18:14:46     INFO - GECKO(7892) |   Could not localize property 'test-createWidget-overflow.tooltiptext'.
[task 2020-10-23T18:14:46.371Z] 18:14:46     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Test button should be overflowing - 
[task 2020-10-23T18:14:46.371Z] 18:14:46     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Test button should have overflowedItem class - 
[task 2020-10-23T18:14:46.371Z] 18:14:46     INFO - TEST-PASS | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Test button should be gone - 
[task 2020-10-23T18:14:51.545Z] 18:14:51     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:14:51.545Z] 18:14:51     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Uncaught exception - undefined - timed out after 50 tries.
[task 2020-10-23T18:14:51.545Z] 18:14:51     INFO - Leaving test bound 
[task 2020-10-23T18:14:51.545Z] 18:14:51     INFO - Entering test bound insertBeforeFirstItemInOverflow
[task 2020-10-23T18:14:51.545Z] 18:14:51     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:14:51.546Z] 18:14:51     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Should start with a non-overflowing toolbar. - 
[task 2020-10-23T18:14:51.546Z] 18:14:51     INFO - Stack trace:
[task 2020-10-23T18:14:51.546Z] 18:14:51     INFO - chrome://mochikit/content/browser-test.js:test_ok:1304
[task 2020-10-23T18:14:51.546Z] 18:14:51     INFO - chrome://mochitests/content/browser/browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js:insertBeforeFirstItemInOverflow:239
[task 2020-10-23T18:14:51.546Z] 18:14:51     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest/<:1069
[task 2020-10-23T18:14:51.546Z] 18:14:51     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:14:51.547Z] 18:14:51     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Should start in default state. - 
[task 2020-10-23T18:14:51.547Z] 18:14:51     INFO - Stack trace:
[task 2020-10-23T18:14:51.547Z] 18:14:51     INFO - chrome://mochikit/content/browser-test.js:test_ok:1304
[task 2020-10-23T18:14:51.547Z] 18:14:51     INFO - chrome://mochitests/content/browser/browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js:insertBeforeFirstItemInOverflow:243
[task 2020-10-23T18:14:51.547Z] 18:14:51     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest/<:1069
[task 2020-10-23T18:14:56.728Z] 18:14:56     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:14:56.728Z] 18:14:56     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Uncaught exception - undefined - timed out after 50 tries.
[task 2020-10-23T18:14:56.728Z] 18:14:56     INFO - Leaving test bound insertBeforeFirstItemInOverflow
[task 2020-10-23T18:15:01.903Z] 18:15:01     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:15:01.903Z] 18:15:01     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | Cleanup function threw an exception - undefined - timed out after 50 tries.
[task 2020-10-23T18:15:01.945Z] 18:15:01     INFO - GECKO(7892) | MEMORY STAT | vsize 2104286MB | vsizeMaxContiguous 68228605MB | residentFast 258MB | heapAllocated 85MB
[task 2020-10-23T18:15:01.945Z] 18:15:01     INFO - TEST-OK | browser/components/customizableui/test/browser_914138_widget_API_overflowable_toolbar.js | took 30145ms
[task 2020-10-23T18:15:01.964Z] 18:15:01     INFO - checking window state
[task 2020-10-23T18:15:01.983Z] 18:15:01     INFO - TEST-START | browser/components/customizableui/test/browser_918049_skipintoolbarset_dnd.js
[task 2020-10-23T18:15:02.176Z] 18:15:02     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:15:02.176Z] 18:15:02     INFO - Buffered messages logged at 18:15:01
[task 2020-10-23T18:15:02.176Z] 18:15:02     INFO - Entering test bound 
[task 2020-10-23T18:15:02.176Z] 18:15:02     INFO - Buffered messages logged at 18:15:02
[task 2020-10-23T18:15:02.176Z] 18:15:02     INFO - Checking if element has non-0 size
[task 2020-10-23T18:15:02.176Z] 18:15:02     INFO - Buffered messages finished
[task 2020-10-23T18:15:02.176Z] 18:15:02     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_918049_skipintoolbarset_dnd.js | Should still be in default state - 
[task 2020-10-23T18:15:02.176Z] 18:15:02     INFO - Stack trace:
[task 2020-10-23T18:15:02.176Z] 18:15:02     INFO - chrome://mochikit/content/browser-test.js:test_ok:1304
[task 2020-10-23T18:15:02.177Z] 18:15:02     INFO - chrome://mochitests/content/browser/browser/components/customizableui/test/browser_918049_skipintoolbarset_dnd.js:null:22
[task 2020-10-23T18:15:02.179Z] 18:15:02     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:15:02.181Z] 18:15:02     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_918049_skipintoolbarset_dnd.js | Should still be in default state - 
[task 2020-10-23T18:15:02.181Z] 18:15:02     INFO - Stack trace:
[task 2020-10-23T18:15:02.181Z] 18:15:02     INFO - chrome://mochikit/content/browser-test.js:test_ok:1304
[task 2020-10-23T18:15:02.182Z] 18:15:02     INFO - chrome://mochitests/content/browser/browser/components/customizableui/test/browser_918049_skipintoolbarset_dnd.js:null:24
[task 2020-10-23T18:15:02.182Z] 18:15:02     INFO - TEST-PASS | browser/components/customizableui/test/browser_918049_skipintoolbarset_dnd.js | Should be next to library button - 
[task 2020-10-23T18:15:02.182Z] 18:15:02     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:15:02.182Z] 18:15:02     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_918049_skipintoolbarset_dnd.js | Should be next to skipintoolbarset item - Got "wrapper-sidebar-button", expected "wrapper-test-skipintoolbarset-item"
[task 2020-10-23T18:15:02.182Z] 18:15:02     INFO - Stack trace:
[task 2020-10-23T18:15:02.182Z] 18:15:02     INFO - chrome://mochikit/content/browser-test.js:test_is:1332
[task 2020-10-23T18:15:02.182Z] 18:15:02     INFO - chrome://mochitests/content/browser/browser/components/customizableui/test/browser_918049_skipintoolbarset_dnd.js:null:34
[task 2020-10-23T18:15:02.182Z] 18:15:02     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:15:02.182Z] 18:15:02     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_918049_skipintoolbarset_dnd.js | Should still be in default state - 
[task 2020-10-23T18:15:02.182Z] 18:15:02     INFO - Stack trace:
[task 2020-10-23T18:15:02.182Z] 18:15:02     INFO - chrome://mochikit/content/browser-test.js:test_ok:1304
[task 2020-10-23T18:15:02.182Z] 18:15:02     INFO - chrome://mochitests/content/browser/browser/components/customizableui/test/browser_918049_skipintoolbarset_dnd.js:null:39
[task 2020-10-23T18:15:02.183Z] 18:15:02     INFO - Leaving test bound 
[task 2020-10-23T18:15:02.183Z] 18:15:02     INFO - Entering test bound asyncCleanup
[task 2020-10-23T18:15:02.242Z] 18:15:02     INFO - Leaving test bound asyncCleanup
[task 2020-10-23T18:15:02.303Z] 18:15:02     INFO - GECKO(7892) | MEMORY STAT | vsize 2104299MB | vsizeMaxContiguous 68228605MB | residentFast 261MB | heapAllocated 90MB
[task 2020-10-23T18:15:02.303Z] 18:15:02     INFO - TEST-OK | browser/components/customizableui/test/browser_918049_skipintoolbarset_dnd.js | took 320ms
[task 2020-10-23T18:15:02.321Z] 18:15:02     INFO - checking window state
[task 2020-10-23T18:15:02.331Z] 18:15:02     INFO - TEST-START | browser/components/customizableui/test/browser_923857_customize_mode_event_wrapping_during_reset.js
[task 2020-10-23T18:15:02.415Z] 18:15:02     INFO - GECKO(7892) | JavaScript error: resource:///modules/UrlbarInput.jsm, line 2825: TypeError: event.target.closest is not a function
[task 2020-10-23T18:15:02.417Z] 18:15:02     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:15:02.417Z] 18:15:02     INFO - Buffered messages logged at 18:15:02
[task 2020-10-23T18:15:02.417Z] 18:15:02     INFO - Entering test bound 
[task 2020-10-23T18:15:02.417Z] 18:15:02     INFO - TEST-PASS | browser/components/customizableui/test/browser_923857_customize_mode_event_wrapping_during_reset.js | Stuff should exist - 
[task 2020-10-23T18:15:02.417Z] 18:15:02     INFO - Buffered messages finished
[task 2020-10-23T18:15:02.417Z] 18:15:02     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_923857_customize_mode_event_wrapping_during_reset.js | Uncaught exception - at chrome://mochikit/content/tests/SimpleTest/EventUtils.js:2644 - Error: No data transfer object after synthesizing the mouse!
[task 2020-10-23T18:15:02.417Z] 18:15:02     INFO - Stack trace:
[task 2020-10-23T18:15:02.417Z] 18:15:02     INFO - synthesizeDragOver@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:2644:11
[task 2020-10-23T18:15:02.417Z] 18:15:02     INFO - synthesizeDrop@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:2766:52
[task 2020-10-23T18:15:02.417Z] 18:15:02     INFO - simulateItemDrag@chrome://mochitests/content/browser/browser/components/customizableui/test/head.js:229:17
[task 2020-10-23T18:15:02.417Z] 18:15:02     INFO - @chrome://mochitests/content/browser/browser/components/customizableui/test/browser_923857_customize_mode_event_wrapping_during_reset.js:15:19
[task 2020-10-23T18:15:02.418Z] 18:15:02     INFO - Leaving test bound 
[task 2020-10-23T18:15:02.418Z] 18:15:02     INFO - Entering test bound asyncCleanup
[task 2020-10-23T18:15:02.428Z] 18:15:02     INFO - GECKO(7892) | console.error: CustomizableUI:
[task 2020-10-23T18:15:02.428Z] 18:15:02     INFO - GECKO(7892) |   TypeError: can't access property "nodeName", aWrapper is null -- resource:///modules/CustomizeMode.jsm:1085
[task 2020-10-23T18:15:02.428Z] 18:15:02     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:15:02.428Z] 18:15:02     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_923857_customize_mode_event_wrapping_during_reset.js | Uncaught exception - NotFoundError: Node.insertBefore: Child to insert before is not a child of this node
[task 2020-10-23T18:15:02.428Z] 18:15:02     INFO - Stack trace:
[task 2020-10-23T18:15:02.428Z] 18:15:02     INFO - insertWidgetBefore@resource:///modules/CustomizableUI.jsm:1500:16
[task 2020-10-23T18:15:02.429Z] 18:15:02     INFO - buildArea@resource:///modules/CustomizableUI.jsm:1012:14
[task 2020-10-23T18:15:02.429Z] 18:15:02     INFO - _rebuildRegisteredAreas@resource:///modules/CustomizableUI.jsm:3034:14
[task 2020-10-23T18:15:02.429Z] 18:15:02     INFO - reset@resource:///modules/CustomizableUI.jsm:2966:10
[task 2020-10-23T18:15:02.429Z] 18:15:02     INFO - reset@resource:///modules/CustomizableUI.jsm:4040:28
[task 2020-10-23T18:15:02.429Z] 18:15:02     INFO - resetCustomization@chrome://mochitests/content/browser/browser/components/customizableui/test/head.js:121:25
[task 2020-10-23T18:15:02.429Z] 18:15:02     INFO - asyncCleanup@chrome://mochitests/content/browser/browser/components/customizableui/test/browser_923857_customize_mode_event_wrapping_during_reset.js:23:9
[task 2020-10-23T18:15:02.429Z] 18:15:02     INFO - Tester_execTest/<@chrome://mochikit/content/browser-test.js:1069:34
[task 2020-10-23T18:15:02.429Z] 18:15:02     INFO - Leaving test bound asyncCleanup
[task 2020-10-23T18:15:02.439Z] 18:15:02     INFO - Console message: [JavaScript Error: "TypeError: event.target.closest is not a function" {file: "resource:///modules/UrlbarInput.jsm" line: 2825}]
[task 2020-10-23T18:15:02.439Z] 18:15:02     INFO - _on_mousedown@resource:///modules/UrlbarInput.jsm:2825:26
[task 2020-10-23T18:15:02.439Z] 18:15:02     INFO - handleEvent@resource:///modules/UrlbarInput.jsm:415:23
[task 2020-10-23T18:15:02.439Z] 18:15:02     INFO - synthesizeMouseAtPoint@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:590:32
[task 2020-10-23T18:15:02.439Z] 18:15:02     INFO - synthesizeMouse@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:522:10
[task 2020-10-23T18:15:02.439Z] 18:15:02     INFO - synthesizeMouseAtCenter@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:697:10
[task 2020-10-23T18:15:02.439Z] 18:15:02     INFO - synthesizeDragOver@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:2632:26
[task 2020-10-23T18:15:02.439Z] 18:15:02     INFO - synthesizeDrop@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:2766:52
[task 2020-10-23T18:15:02.439Z] 18:15:02     INFO - simulateItemDrag@chrome://mochitests/content/browser/browser/components/customizableui/test/head.js:229:17
[task 2020-10-23T18:15:02.439Z] 18:15:02     INFO - @chrome://mochitests/content/browser/browser/components/customizableui/test/browser_923857_customize_mode_event_wrapping_during_reset.js:15:19
[task 2020-10-23T18:15:02.439Z] 18:15:02     INFO - 
[task 2020-10-23T18:15:02.498Z] 18:15:02     INFO - GECKO(7892) | MEMORY STAT | vsize 2104299MB | vsizeMaxContiguous 68228605MB | residentFast 262MB | heapAllocated 92MB
[task 2020-10-23T18:15:02.498Z] 18:15:02     INFO - TEST-OK | browser/components/customizableui/test/browser_923857_customize_mode_event_wrapping_during_reset.js | took 163ms
[task 2020-10-23T18:15:02.498Z] 18:15:02     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-10-23T18:15:02.498Z] 18:15:02     INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_923857_customize_mode_event_wrapping_during_reset.js | Found an unexpected tab at the end of test run: about:blank - 
[task 2020-10-23T18:15:02.517Z] 18:15:02     INFO - checking window state
[task 2020-10-23T18:15:02.535Z] 18:15:02     INFO - TEST-START | browser/components/customizableui/test/browser_927717_customize_drag_empty_toolbar.js
[task 2020-10-23T18:15:02.785Z] 18:15:02     INFO - GECKO(7892) | MEMORY STAT | vsize 2104299MB | vsizeMaxContiguous 68228605MB | residentFast 263MB | heapAllocated 94MB
[task 2020-10-23T18:15:02.785Z] 18:15:02     INFO - TEST-OK | browser/components/customizableui/test/browser_927717_customize_drag_empty_toolbar.js | took 251ms
...```