[Webkit-unassigned] [Bug 90085] New: [GTK] WebKit with AC enabled breaks GtkOverlay when using the OSD style class

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=90085

           Summary: [GTK] WebKit with AC enabled breaks GtkOverlay when
                    using the OSD style class
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: cgarcia at igalia.com
                CC: xan.lopez at gmail.com, gns at gnome.org, alex at igalia.com,
                    mrobinson at webkit.org


Which is the case of epiphany, the child widgets of the GtkOverlay are not shown when webkit is built with AC enabled. The problem happens with WebKit1 and WebKit2, and I've checked that it doesn't happen when building without AC (I used --disable-accelerated-compositing --disable-webgl --with-acceleration-backend=none configure options, it needs a patch to build with those flags, though). 
I think we should fix the build with AC disabled, and disable it by default until the problem is fixed beause it breaks important basic features in epiphany (loading progress bar, hovered link messages and fullscreen message box)

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