One of three things keeping aurora closed after the merge. My best wild guess so far, after I was told that the webide button (visible in the screenshot) puts itself in the toolbar when the feature is used, but is not a new thing in this version of aurora, is that the bustage is that this is the first time on aurora that we've had a webide-using test which runs in the same chunk of browser-chrome as browser_880382_drag_wide_widgets_in_panel.js and before it runs. https://treeherder.mozilla.org/logviewer.html#?job_id=71230808&repo=mozilla-aurora 17:43:35 INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_880382_drag_wide_widgets_in_panel.js | Area PanelUI-contents should have 11 items. - Got 12, expected 11 17:43:35 INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_880382_drag_wide_widgets_in_panel.js | Area PanelUI-contents should have 10 items. - Got 11, expected 10 17:43:36 INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_880382_drag_wide_widgets_in_panel.js | Area PanelUI-contents should have 10 items. - Got 11, expected 10 17:43:36 INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_880382_drag_wide_widgets_in_panel.js | Area PanelUI-contents should have 10 items. - Got 11, expected 10 17:43:36 INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_880382_drag_wide_widgets_in_panel.js | Area PanelUI-contents should have 11 items. - Got 12, expected 11 17:43:36 INFO - TEST-UNEXPECTED-FAIL | browser/components/customizableui/test/browser_880382_drag_wide_widgets_in_panel.js | Item 10 in PanelUI-contents should match expectations. - Got edit-controls, expected email-link-button

gijs, mike, could you take a look at this, its one of the tree closing reasons for aurora, thanks!

Pushed to aurora to help de-bust the tree: remote: https://treeherder.mozilla.org/#/jobs?repo=mozilla-aurora&revision=5d14c6efd4bab1bb849db13238bf95a3a06b1d9e

Comment on attachment 8829798 [details] Bug 1333305 - fix perma-orange by only removing buttons if they're present (splice(-1, 1) removes the last element of an array), https://reviewboard.mozilla.org/r/106790/#review107816

Pushed by gijskruitbosch@gmail.com: https://hg.mozilla.org/integration/autoland/rev/8c5ec728bfd0 fix perma-orange by only removing buttons if they're present (splice(-1, 1) removes the last element of an array), r=mikedeboer

Thanks, sorry about that.