[Webkit-unassigned] [Bug 188377] New: [GTK] [2.20.4] Occasional rendering artifacts

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=188377

            Bug ID: 188377
           Summary: [GTK] [2.20.4] Occasional rendering artifacts
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: berto at igalia.com
                CC: bugs-noreply at webkitgtk.org

Created attachment 346704

  --> https://bugs.webkit.org/attachment.cgi?id=346704&action=review

Example of corrupted output

I'm finding occasional rendering artifacts with WebKitGTK+ 2.20.4 that I don't think were present in 2.20.3.

I've seen them in different websites, but here's one simple way to reproduce one:

- Log in to Facebook
- Look for any post and place the mouse pointer over the "Like" button.
- There's a pop up animation with the different kind of reactions ("Love", "Like", "Sad", ...)

The animation should be smooth but in most cases the output is corrupted. See attached screenshot for an example.

I have to say that in most cases the problem disappears after a few seconds and everything looks normal, so this doesn't make the browser unusable.

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