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  1. Qt
  2. QTBUG-45755

Some Qt apps crashs if they are compiled with gcc5

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Details

    • Bug
    • Resolution: Done
    • P0: Blocker
    • 5.4.2
    • 5.4.2, 5.5.0 Alpha
    • Core: Other
    • None
    • Debian SID + gcc 5 from eperimental
    • 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
          For Gerrit Dashboard: QTBUG-45755
          # Subject Branch Project Status CR V
          111427,3 configure: Change default of CFG_REDUCE_RELOCATIONS to "no". 5.4.2 qt/qtbase Status: MERGED +2 0
          111787,2 Require -fPIC instead of just -fPIE for -reduce-relocations 5.4.2 qt/qtbase Status: MERGED +2 0
          111886,2 Revert "configure: Change default of CFG_REDUCE_RELOCATIONS to "no"." 5.4.2 qt/qtbase Status: MERGED +2 0
          112053,4 Make qglobal.h complain if you use -fPIE 5.4.2 qt/qtbase Status: MERGED +2 0
          112060,3 Try to ensure that -fPIC is used in CMake builds 5.4.2 qt/qtbase Status: MERGED +2 0
          112224,3 tst_bic: Use -fPIC instead of -fPIE. master qt/qtqa Status: MERGED +2 0
          112240,2 Make QCoreApplication abort execution if it detects copy relocations 5.5 qt/qtbase Status: ABANDONED -1 0

          Activity

            People

              thiago Thiago Macieira
              taipan BogDan Vatra
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              Dates

                Created:
                Updated:
                Resolved: