Uploaded image for project: 'Qt'
  1. Qt
  2. QTBUG-73539

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

    XMLWordPrintable

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P1: Critical
    • Resolution: Done
    • Affects Version/s: 5.13
    • Fix Version/s: 5.12.2, 5.14.0 Alpha
    • Component/s: GUI: Painting
    • Labels:
      None
    • Environment:
      CPU: Haswell (Core i7-4700MQ)
      Compiler: Mingw64 7.3
    • Platform/s:
      Windows
    • Commits:
      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

          Activity

            People

            Assignee:
            allan.jensen Allan Sandfeld Jensen
            Reporter:
            dkazakov Dmitry Kazakov
            Votes:
            0 Vote for this issue
            Watchers:
            5 Start watching this issue

              Dates

              Created:
              Updated:
              Resolved:

                Gerrit Reviews

                There are no open Gerrit changes