[Webkit-unassigned] [Bug 95927] New: Layout Test fast/regions/flows-dependency-dynamic-remove.html and fast/regions/flows-dependency-same-flow.html are crashing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=95927

           Summary: Layout Test
                    fast/regions/flows-dependency-dynamic-remove.html and
                    fast/regions/flows-dependency-same-flow.html are
                    crashing
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bashi at chromium.org
                CC: jchaffraix at webkit.org, mihnea at adobe.com


The following layout test is crashing on Chromium mac

fast/regions/flows-dependency-dynamic-remove.html
fast/regions/flows-dependency-same-flow.html

Please check http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=fast%2Fregions%2Fflows-dependency-dynamic-remove.html%20fast%2Fregions%2Fflows-dependency-same-flow.html

Probable cause:
http://trac.webkit.org/changeset/127596

I can reproduce the crash with NRWT, but couldn't when I use DRT directly. Here is a crash log. It seems there is a condition which cause a stack overflow.

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   DumpRenderTree                    0x00640e4b WebCore::RenderBlock::computePreferredLogicalWidths() + 11
1   DumpRenderTree                    0x006cb2c2 WebCore::RenderBox::minPreferredLogicalWidth() const + 82
2   DumpRenderTree                    0x00870b49 WebCore::RenderRegion::minPreferredLogicalWidth() const + 137
3   DumpRenderTree                    0x00642dc1 WebCore::RenderBlock::computeBlockPreferredLogicalWidths() + 1265
4   DumpRenderTree                    0x006411d5 WebCore::RenderBlock::computePreferredLogicalWidths() + 917
5   DumpRenderTree                    0x006cb2c2 WebCore::RenderBox::minPreferredLogicalWidth() const + 82
6   DumpRenderTree                    0x00642dc1 WebCore::RenderBlock::computeBlockPreferredLogicalWidths() + 1265
7   DumpRenderTree                    0x006411d5 WebCore::RenderBlock::computePreferredLogicalWidths() + 917
8   DumpRenderTree                    0x006cb2c2 WebCore::RenderBox::minPreferredLogicalWidth() const + 82
9   DumpRenderTree                    0x00870b49 WebCore::RenderRegion::minPreferredLogicalWidth() const + 137
10  DumpRenderTree                    0x00642dc1 WebCore::RenderBlock::computeBlockPreferredLogicalWidths() + 1265
11  DumpRenderTree                    0x006411d5 WebCore::RenderBlock::computePreferredLogicalWidths() + 917
12  DumpRenderTree                    0x006cb2c2 WebCore::RenderBox::minPreferredLogicalWidth() const + 82
13  DumpRenderTree                    0x00642dc1 WebCore::RenderBlock::computeBlockPreferredLogicalWidths() + 1265
14  DumpRenderTree                    0x006411d5 WebCore::RenderBlock::computePreferredLogicalWidths() + 917
15  DumpRenderTree                    0x006cb2c2 WebCore::RenderBox::minPreferredLogicalWidth() const + 82
16  DumpRenderTree                    0x00870b49 WebCore::RenderRegion::minPreferredLogicalWidth() const + 137
17  DumpRenderTree                    0x00642dc1 WebCore::RenderBlock::computeBlockPreferredLogicalWidths() + 1265
18  DumpRenderTree                    0x006411d5 WebCore::RenderBlock::computePreferredLogicalWidths() + 917
19  DumpRenderTree                    0x006cb2c2 WebCore::RenderBox::minPreferredLogicalWidth() const + 82

....

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