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  1. Qt
  2. QTBUG-73539

[Reg 5.12->5.13] Crash in qdrawhelper.cpp because of SSE-optimized code

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Details

    • Bug
    • Resolution: Done
    • P1: Critical
    • 5.12.2, 5.14.0 Alpha
    • 5.13
    • GUI: Painting
    • None
    • CPU: Haswell (Core i7-4700MQ)
      Compiler: Mingw64 7.3
    • Windows
    • 37352b23a90e9b4550b5a5cef175f2a77598faa0 (qt/qtbase/5.12)

    Description

      Starting any qwidget-based GUI application on 5.13 or dev branch causes the app to crash. The problem doesn't happen in 5.12.1 branch on the same device.

      It looks like the problem is raleted to SSE-optimized code in qdrawhelper.cpp, because commenting-out all the SSE switches in this file fixes the problem.

       

      Attachments

        1. backtrace.txt
          5 kB
        2. hacky_disable_sse_patch.diff
          13 kB
        3. qtbug73539_stack.txt
          94 kB
        4. qtdiag.txt
          10 kB
        5. TestSimpleWidget.zip
          5 kB
        For Gerrit Dashboard: QTBUG-73539
        # Subject Branch Project Status CR V
        252163,1 Work around crash on MingW 5.13 qt/qtbase Status: ABANDONED +2 0
        252214,2 x86: Disable AVX support on 64-bit MinGW 5.12 qt/qtbase Status: MERGED +2 0

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          People

            allan.jensen Allan Sandfeld Jensen
            dkazakov Dmitry Kazakov
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            Dates

              Created:
              Updated:
              Resolved:

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