[Webkit-unassigned] [Bug 193624] New: [GTK] Layout test compositing/fixed-with-main-thread-scrolling.html is flaky

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=193624

            Bug ID: 193624
           Summary: [GTK] Layout test
                    compositing/fixed-with-main-thread-scrolling.html is
                    flaky
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at igalia.com
                CC: bugs-noreply at webkitgtk.org, simon.fraser at apple.com

Layout test compositing/fixed-with-main-thread-scrolling.html is a flaky failure since it was added in r238876 "REGRESSION (r238090): position:fixed sidebar on ​https://www.w3.org/TR/SVG2/coords.html does not stay fixed":

https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20(Tests)/r240208%20(9437)/compositing/fixed-with-main-thread-scrolling-diffs.html

Problem is the scrollbar often -- but not always -- ends up in the wrong position. The test scrolls the viewport by fixed amounts, so that shouldn't happen.

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