[Webkit-unassigned] [Bug 172502] New: Rendering (accelerated?) badly broken in 2.17.3

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=172502

            Bug ID: 172502
           Summary: Rendering (accelerated?) badly broken in 2.17.3
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: manday at openmail.cc
                CC: bugs-noreply at webkitgtk.org

As of 2.17.3, about 10% of the pictures on a website are typically broken in a way that looks like a broke decoding or memory violations. One example is attached. Other examples are pictures being interchanged, pictures being mixed together, or random behaviour during redraw (scrolling). I suspect a screenshot alone doesn't help much pinpointing the cause but for now I can not bisect the issue. What might be worth mentioning:

Mesa from GIT @ 17.1-branchpoint-1052-g1586768e7
Weston from GIT @ 2.0.0-73-geca5cca5
Happens also under other compositors, all pure Wayland
Configured with -DPORT=GTK -DUSE_LD_GOLD=OFF -DUSE_LIBSECRET=OFF -DENABLE_GEOLOCATION=OFF -DENABLE_INTROSPECTION=OFF -DENABLE_MINIBROWSER=ON -DCMAKE_INSTALL_PREFIX=/home/manday/local/ -DCMAKE_BUILD_TYPE=Release -DENABLE_SPELLCHECK=OFF -DUSE_LIBNOTIFY=OFF -DUSE_LIBHYPHEN=OFF

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