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  1. Qt
  2. QTBUG-45755

Some Qt apps crashs if they are compiled with gcc5

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    • Icon: Bug Bug
    • Resolution: Done
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    • 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)

      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.

        1. gcc5_crash.txt
          12 kB
        2. gdb_log.txt
          14 kB
        3. libQt5Core.so.dump.txt.bz2
          243 kB
        4. libQt5Gui.so.dump.txt
          556 kB
        5. trace_log.txt
          8 kB
        6. application.dump.txt
          12 kB
        7. Makefile
          93 kB
        8. libQt5Core-gcc49-vs-gcc51-relocs.diff
          31 kB
        9. clang-lto-copy-relocs.txt
          10 kB
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            thiago Thiago Macieira
            taipan BogDan Vatra
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              Created:
              Updated:
              Resolved: