[Webkit-unassigned] [Bug 213228] New: [WPE] fast/viewport/viewport-1.html is a flaky crash

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=213228

            Bug ID: 213228
           Summary: [WPE] fast/viewport/viewport-1.html is a flaky crash
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dpino at igalia.com

The test started to crash regularly since:

r261613                       NOERROR
[r261614-r261615]             UNKNOWN
r261616                       CRASH (Expected: PASS)

Among the range r261616 seems like a likely cause for the regression.

Crash-log: https://build.webkit.org/results/WPE%20Linux%2064-bit%20Release%20(Tests)/r263069%20(18619)/fast/viewport/viewport-1-crash-log.txt

Thread 1 (Thread 0x7f5e5ded5100 (LWP 7264)):
#0  0x00007f5e6663fa35 in WebCore::ScrollingTreeFrameScrollingNodeNicosia::repositionScrollingLayers() () at /app/webkit/WebKitBuild/Release/lib/libWPEWebKit-1.0.so.3
#1  0x00007f5e6663af13 in WebCore::ScrollingTreeScrollingNode::applyLayerPositions() () at /app/webkit/WebKitBuild/Release/lib/libWPEWebKit-1.0.so.3
#2  0x00007f5e66634403 in WebCore::ScrollingTree::applyLayerPositionsRecursive(WebCore::ScrollingTreeNode&) () at /app/webkit/WebKitBuild/Release/lib/libWPEWebKit-1.0.so.3
#3  0x00007f5e66634474 in WebCore::ScrollingTree::applyLayerPositions() () at /app/webkit/WebKitBuild/Release/lib/libWPEWebKit-1.0.so.3
#4  0x00007f5e665920f5 in WebCore::Page::finalizeRenderingUpdate(WTF::OptionSet<WebCore::FinalizeRenderingUpdateFlags>) () at /app/webkit/WebKitBuild/Release/lib/libWPEWebKit-1.0.so.3
#5  0x00007f5e6516f315 in WebKit::CompositingCoordinator::flushPendingLayerChanges() () at /app/webkit/WebKitBuild/Release/lib/libWPEWebKit-1.0.so.3
#6  0x00007f5e651704e0 in WebKit::LayerTreeHost::layerFlushTimerFired() () at /app/webkit/WebKitBuild/Release/lib/libWPEWebKit-1.0.so.3
#7  0x00007f5e651707e8 in WebKit::LayerTreeHost::renderNextFrame(bool) () at /app/webkit/WebKitBuild/Release/lib/libWPEWebKit-1.0.so.3
#8  0x00007f5e685fda84 in WTF::RunLoop::TimerBase::TimerBase(WTF::RunLoop&)::{lambda(void*)#1}::_FUN(void*) () at /app/webkit/WebKitBuild/Release/lib/libWPEWebKit-1.0.so.3
#9  0x00007f5e5f49fc3e in g_main_dispatch (context=0x55e351060310) at ../glib/gmain.c:3309
#10 0x00007f5e5f49fc3e in g_main_context_dispatch (context=context at entry=0x55e351060310) at ../glib/gmain.c:3974
#11 0x00007f5e5f49fff0 in g_main_context_iterate (context=0x55e351060310, block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>) at ../glib/gmain.c:4047
#12 0x00007f5e5f4a02e3 in g_main_loop_run (loop=0x55e351060400) at ../glib/gmain.c:4241
#13 0x00007f5e685fdec0 in WTF::RunLoop::run() () at /app/webkit/WebKitBuild/Release/lib/libWPEWebKit-1.0.so.3
#14 0x00007f5e65182067 in WebKit::WebProcessMain(int, char**) () at /app/webkit/WebKitBuild/Release/lib/libWPEWebKit-1.0.so.3
#15 0x00007f5e5ed46183 in __libc_start_main (main=0x55e350cbaad0 <main>, argc=4, argv=0x7ffe21684458, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe21684448) at ../csu/libc-start.c:308
#16 0x000055e350cbab5e in _start () at ../sysdeps/x86_64/start.S:120

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