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  1. Qt
  2. QTBUG-45755

Some Qt apps crashs if they are compiled with gcc5

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P0: Blocker
    • Resolution: Done
    • Affects Version/s: 5.4.2, 5.5.0 Alpha
    • Fix Version/s: 5.4.2
    • Component/s: Core: Other
    • Labels:
      None
    • Environment:
      Debian SID + gcc 5 from eperimental
    • Commits:
      36d6eb721e7d5997ade75e289d4088dc48678d0d (qtbase/5.4.2 8.5.2015, 5.4.2)

      Description

      I've tried a few examples and some of them are crashing (e.g. examples/widgets/mainwindows/application).

      From what I've seen it seems that (sometimes) gcc5 fails to static_cast QCoreAppication to QGuiApplication, qGuiApp macro (static_cast<QGuiApplication *>(QCoreApplication::instance())) is 0.

      I realy have no idea why somethimes qGuiApp works and sometime doesn't, and I have no idea if its gcc's fault or Qt's.

      I attached the full backtrace.

        Attachments

        1. application.dump.txt
          12 kB
        2. clang-lto-copy-relocs.txt
          10 kB
        3. gcc5_crash.txt
          12 kB
        4. gdb_log.txt
          14 kB
        5. libQt5Core.so.dump.txt.bz2
          243 kB
        6. libQt5Core-gcc49-vs-gcc51-relocs.diff
          31 kB
        7. libQt5Gui.so.dump.txt
          556 kB
        8. Makefile
          93 kB
        9. trace_log.txt
          8 kB

          Issue Links

          is required for

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-44881 Issues to be fixed before 5.4.2

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          replaces

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-45836 Segmentation fault with sendEvent()

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-46647 QByteArray::isNull() doesn't work properly under CMake

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-45760 Some Qt apps crashs if they are compiled with gcc5

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
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            Activity

              People

              • Assignee:
                thiago Thiago Macieira
                Reporter:
                taipan BogDan Vatra
              • Votes:
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                Watchers:
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                Dates

                • Created:
                  Updated:
                  Resolved: