[Webkit-unassigned] [Bug 172167] New: [Threaded Compositor] SHOULD NEVER BE REACHED in WebKit::CompositingRunLoop::updateCompleted

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=172167

            Bug ID: 172167
           Summary: [Threaded Compositor] SHOULD NEVER BE REACHED in
                    WebKit::CompositingRunLoop::updateCompleted
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Keywords: Gtk, LayoutTestFailure
          Severity: Normal
          Priority: P2
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cgarcia at igalia.com
                CC: bugs-noreply at webkitgtk.org, zan at falconsigh.net

This is still happening, even after r216182, less often but still happens. There are two conditions in which this can happen:

 - Again in force repaint. r216182 fixed the case of force repaint called when update state is completed, but it can also crash if update state is inProgress or PendingAfterCompletion when m_coordinateUpdateCompletionWithClient is true.

 - When the threaded compositor is invalidated right after renderLayerTree() starts, but before it finishes.

I'll submit a patch to fix this.

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