[Webkit-unassigned] [Bug 150620] New: [GTK] Epiphany with Debug mode compiled WebKitGtk+ 2.10.3 hits ASSERT_ARG on willEnterAcceleratedCompositingMode

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=150620

            Bug ID: 150620
           Summary: [GTK] Epiphany with Debug mode compiled WebKitGtk+
                    2.10.3 hits ASSERT_ARG on
                    willEnterAcceleratedCompositingMode
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: agomez at igalia.com
                CC: bugs-noreply at webkitgtk.org

Created attachment 264208
  --> https://bugs.webkit.org/attachment.cgi?id=264208&action=review
BT from gdb

I'm using WebKitGtk+ with my own JHBuild setting:
https://github.com/tanty/jhbuild-epiphany/tree/wkgtk-devel

Epiphany 3.18.0 and WebKit 2.10.3

I'm running Epiphany with the dconf key:

"process-model" = "shared-secondary-process"

When visiting several pages, eventually, epiphany crashes.

This bug is not reproducible in a predictable way but happens quite often.

--

It seems, the crash happens when hitting:

#1  0x00007ffff13d6471 in willEnterAcceleratedCompositingMode () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.3/Source/WebKit2/UIProcess/DrawingAreaProxyImpl.cpp:213
213         ASSERT_ARG(backingStoreStateID, backingStoreStateID <= m_currentBackingStoreStateID);

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