Regressed in http://trac.webkit.org/changeset/221338 (is there a way to link to the particular line on that Trac page?) https://github.com/WebKit/webkit/commit/0658355ecdb6d2a5124409ca09611c489214b680#diff-c25e9ae6392f7d5378a5d218d4b2522bL372 let totalItemWidth = this._visibleNavigationItems.reduce((total, item) => item.minimumWidth, 0); totalItemWidth here is always minimumWidth of the last item.
Created attachment 326054 [details] Patch
This regression had no user impact in US English localization because WI.Sidebar.AbsoluteMinimumWidth of 200px provided sufficient width to fit all navigation items in our sidebars. There could have been issues with other localizations.
Comment on attachment 326054 [details] Patch r=me
Comment on attachment 326054 [details] Patch Clearing flags on attachment: 326054 Committed r224481: <https://trac.webkit.org/changeset/224481>
All reviewed patches have been landed. Closing bug.
<rdar://problem/35567113>