[PyQt] [BUG] PyQt5 default behaviour related to sip.setdestroyonexit()

[Phil Thompson]

Can you try tonight's SIP snapshot (or the current hg). You will need to rebuild PyQt5 with it.

Thanks,
Phil

On 15 Dec 2015, at 1:48 pm, Vladimir Rutsky <rutsky.vladimir at gmail.com> wrote:
> Here is stack trace on Ubuntu 14.04 (Qt without debug symbols):
> 
> $ QT_LINUX_ACCESSIBILITY_ALWAYS_ON=1 gdb --args python
> pyqt5_destroy_on_exit_test.py
> GNU gdb (Ubuntu 7.9-1ubuntu1) 7.9
> Copyright (C) 2015 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
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> and "show warranty" for details.
> This GDB was configured as "x86_64-linux-gnu".
> Type "show configuration" for configuration details.
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>.
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> <http://www.gnu.org/software/gdb/documentation/>.
> For help, type "help".
> Type "apropos word" to search for commands related to "word"...
> Reading symbols from python...done.
> (gdb) r
> Starting program:
> /home/bob/work/modernization/protoacs/env_dbg/bin/python
> pyqt5_destroy_on_exit_test.py
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
> Weak ref <weakref at 0x7fffdf17c358; dead> is dead
> [New Thread 0x7fffdf9b2700 (LWP 13728)]
> [New Thread 0x7fffe03f6700 (LWP 13727)]
> [New Thread 0x7fffea824700 (LWP 13726)]
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff5c282b8 in qpycore_qobject_metaobject
> (pySelf=0x7fffdf185898, base=0x7fffed84a080
> <sipTypeDef_QtWidgets_QMenu>) at
> ../qpy/QtCore/qpycore_qobject_helpers.cpp:52
> warning: Source file is more recent than executable.
> 52          if (pySelf && ((pyqtWrapperType *)Py_TYPE(pySelf))->metaobject)
> (gdb) bt
> #0  0x00007ffff5c282b8 in qpycore_qobject_metaobject
> (pySelf=0x7fffdf185898, base=0x7fffed84a080
> <sipTypeDef_QtWidgets_QMenu>) at
> ../qpy/QtCore/qpycore_qobject_helpers.cpp:52
> #1  0x00007fffed334e64 in sipQMenu::metaObject (this=0xeef160) at
> sipQtWidgetspart0.cpp:132467
> #2  0x00007ffff5564a63 in QObject::~QObject() () from
> /home/bob/Qt/5.5/gcc_64/lib/libQt5Core.so.5
> #3  0x00007ffff1698058 in ?? () from /home/bob/Qt/5.5/gcc_64/lib/libQt5Gui.so.5
> #4  0x00007ffff6adb259 in __run_exit_handlers (status=0,
> listp=0x7ffff6e5d6c8 <__exit_funcs>,
> run_list_atexit=run_list_atexit at entry=true) at exit.c:82
> #5  0x00007ffff6adb2a5 in __GI_exit (status=<optimized out>) at exit.c:104
> #6  0x00007ffff6ac0ecc in __libc_start_main (main=0x41e4d6 <main>,
> argc=2, argv=0x7fffffffdc58, init=<optimized out>, fini=<optimized
> out>, rtld_fini=<optimized out>, stack_end=0x7fffffffdc48)
>    at libc-start.c:321
> #7  0x000000000041e409 in _start ()
> (gdb) list
> 47      // This is the helper for all implementations of QObject::metaObject().
> 48      const QMetaObject *qpycore_qobject_metaobject(sipSimpleWrapper *pySelf,
> 49              sipTypeDef *base)
> 50      {
> 51          // Return the dynamic meta-object if there is one.
> 52          if (pySelf && ((pyqtWrapperType *)Py_TYPE(pySelf))->metaobject)
> 53              return ((pyqtWrapperType *)Py_TYPE(pySelf))->metaobject->mo;
> 54
> 55          // Fall back to the static Qt meta-object.
> 56          return reinterpret_cast<const QMetaObject
> *>(((pyqt5ClassTypeDef *)base)->static_metaobject);
> (gdb)
> 
> On Windows I have Qt with debug symbols:
> 
>  QtCore_d.pyd!qpycore_qobject_metaobject(_sipSimpleWrapper *
> pySelf=0x044b6928, _sipTypeDef * base=0x0435fdc8) Line 52 C++
>  QtWidgets_d.pyd!sipQMenu::metaObject() Line 197613 C++
>  Qt5Cored.dll!QObject::~QObject() Line 987 C++
>  Qt5Guid.dll!QAccessibleCache::~QAccessibleCache() C++
>  Qt5Guid.dll!QAccessibleCache::`vector deleting destructor'(unsigned int) C++
>  Qt5Guid.dll!``anonymous
> namespace'::Q_QGS_qAccessibleCache::innerFunction'::`8'::Cleanup::~Cleanup()
> Line 46 C++
>  Qt5Guid.dll!``anonymous
> namespace'::Q_QGS_qAccessibleCache::innerFunction'::`9'::`dynamic
> atexit destructor for 'cleanup''() C++
>  Qt5Guid.dll!_CRT_INIT(void * hDllHandle=0x03370000, unsigned long
> dwReason=0, void * lpreserved=0x00000001) Line 416 C
>  Qt5Guid.dll!__DllMainCRTStartup(void * hDllHandle=0x03370000,
> unsigned long dwReason=0, void * lpreserved=0x00000001) Line 522 C
>  Qt5Guid.dll!_DllMainCRTStartup(void * hDllHandle=0x03370000,
> unsigned long dwReason=0, void * lpreserved=0x00000001) Line 472 C
>  ntdll.dll!_LdrpCallInitRoutine at 16 () Unknown
>  ntdll.dll!_LdrShutdownProcess at 0 () Unknown
>  ntdll.dll!_RtlExitUserProcess at 4 () Unknown
>  kernel32.dll!_ExitProcessStub at 4 () Unknown
>  msvcr110d.dll!__crtExitProcess(int status=0) Line 726 C
>  msvcr110d.dll!doexit(int code=0, int quick=0, int retcaller=0) Line 639 C
>  msvcr110d.dll!exit(int code=0) Line 395 C
>  python_d.exe!__tmainCRTStartup() Line 549 C
>  python_d.exe!wmainCRTStartup() Line 377 C
>  kernel32.dll!@BaseThreadInitThunk at 12 () Unknown
>  ntdll.dll!___RtlUserThreadStart at 8 () Unknown
>  ntdll.dll!__RtlUserThreadStart at 8 () Unknown
> 
> 
> Regards,
> 
> Vladimir Rutsky
>