[vtkusers] Examples/Python/Widgets/EmbedPyQt segfault on Ubuntu
Elvis Stansvik
elvis.stansvik at orexplore.com
Tue Feb 23 06:01:13 EST 2016
2016-02-23 8:37 GMT+01:00 Elvis Stansvik <elvis.stansvik at orexplore.com>:
> Den 22 feb 2016 1:15 em skrev "Elvis Stansvik" <
> elvis.stansvik at orexplore.com>:
> >
> > Hi all,
> >
> > Trying the
> >
> > http://www.vtk.org/Wiki/VTK/Examples/Python/Widgets/EmbedPyQt
> >
> > example on Ubuntu with python-vtk6 (6.2.0+dfsg1-4ubuntu5) and python-qt4
> (4.11.4+dfsg-1build3) installed, I get a strange segmentation fault on
> startup:
> >
> >
> >
> > estan at newton:~/orexplore/dev/gui-demo$ gdb python
> > GNU gdb (Ubuntu 7.10-1ubuntu2) 7.10
> > 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.
> > There is NO WARRANTY, to the extent permitted by law. Type "show
> copying"
> > 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/>.
> > Find the GDB manual and other documentation resources online at:
> > <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...Reading symbols from
> /usr/lib/debug//usr/bin/python2.7...done.
> > done.
> > (gdb) run test2.py
> > Starting program: /usr/bin/python test2.py
> > [Thread debugging using libthread_db enabled]
> > Using host libthread_db library
> "/lib/x86_64-linux-gnu/libthread_db.so.1".
> > [New Thread 0x7fffb1bb8700 (LWP 3113)]
> > [New Thread 0x7fffb13b7700 (LWP 3114)]
> > [New Thread 0x7fffacbb6700 (LWP 3115)]
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > 0x00007fff97a2885e in _GLOBAL__sub_I_qpycore_classinfo.cpp () from
> /usr/lib/python2.7/dist-packages/PyQt4/QtCore.so
> > (gdb) bt
> > #0 0x00007fff97a2885e in _GLOBAL__sub_I_qpycore_classinfo.cpp () from
> /usr/lib/python2.7/dist-packages/PyQt4/QtCore.so
> > #1 0x00007ffff7de960a in call_init (l=<optimized out>, argc=argc at entry=2,
> argv=argv at entry=0x7fffffffddf8, env=env at entry=0x7fffffffde10) at
> dl-init.c:72
> > #2 0x00007ffff7de971b in call_init (env=<optimized out>,
> argv=<optimized out>, argc=<optimized out>, l=<optimized out>) at
> dl-init.c:30
> > #3 _dl_init (main_map=main_map at entry=0x9e8d10, argc=2,
> argv=0x7fffffffddf8, env=0x7fffffffde10) at dl-init.c:120
> > #4 0x00007ffff7dee5d7 in dl_open_worker (a=a at entry=0x7fffffffd1d8) at
> dl-open.c:579
> > #5 0x00007ffff7de94b4 in _dl_catch_error (objname=objname at entry=0x7fffffffd1c8,
> errstring=errstring at entry=0x7fffffffd1d0, mallocedp=mallocedp at entry=0x7fffffffd1c7,
> operate=operate at entry=0x7ffff7dee0f0 <dl_open_worker>, args=args at entry=0x7fffffffd1d8)
> at dl-error.c:187
> > #6 0x00007ffff7ded9f3 in _dl_open (file=0xee42e0
> "/usr/lib/python2.7/dist-packages/PyQt4/QtCore.so", mode=-2147483646,
> caller_dlopen=0x51a359 <_PyImport_GetDynLoadFunc+233>, nsid=-2,
> argc=<optimized out>, argv=<optimized out>, env=0x7fffffffde10) at
> dl-open.c:663
> > #7 0x00007ffff75edfc9 in dlopen_doit (a=a at entry=0x7fffffffd3f0) at
> dlopen.c:66
> > #8 0x00007ffff7de94b4 in _dl_catch_error (objname=0x9a1650,
> errstring=0x9a1658, mallocedp=0x9a1648, operate=0x7ffff75edf70
> <dlopen_doit>, args=0x7fffffffd3f0) at dl-error.c:187
> > #9 0x00007ffff75ee62d in _dlerror_run (operate=operate at entry=0x7ffff75edf70
> <dlopen_doit>, args=args at entry=0x7fffffffd3f0) at dlerror.c:163
> > #10 0x00007ffff75ee061 in __dlopen (file=<optimized out>,
> mode=<optimized out>) at dlopen.c:87
> > #11 0x000000000051a359 in _PyImport_GetDynLoadFunc () at
> ../Python/dynload_shlib.c:140
> > #12 0x0000000000519eb4 in _PyImport_LoadDynamicModule () at
> ../Python/importdl.c:42
> > #13 0x00000000004a2891 in import_submodule () at ../Python/import.c:2704
> > #14 0x00000000004a7545 in ensure_fromlist () at ../Python/import.c:2610
> > #15 0x00000000004a1cc8 in import_module_level.isra.3 (level=-1,
> fromlist=('QtCore', 'QtGui'), globals=<optimized out>, name=<optimized
> out>) at ../Python/import.c:2273
> > #16 PyImport_ImportModuleLevel () at ../Python/import.c:2292
> > #17 0x00000000004a4834 in builtin___import__ () at
> ../Python/bltinmodule.c:49
> > #18 0x00000000004a45de in PyObject_Call () at ../Objects/abstract.c:2529
> > #19 0x00000000004c3e40 in PyEval_CallObjectWithKeywords () at
> ../Python/ceval.c:4225
> > #20 0x00000000004c2a38 in PyEval_EvalFrameEx () at ../Python/ceval.c:2628
> > #21 0x00000000004b7986 in PyEval_EvalCodeEx () at ../Python/ceval.c:3588
> > #22 0x00000000004e8f3f in PyEval_EvalCode (locals={'vtk': <module at
> remote 0x7ffff7eb70f8>, '__builtins__': <module at remote 0x7ffff7f79b08>,
> '__file__': 'test2.py', '__package__': None, 'sys': <module at remote
> 0x7ffff7f79bb0>, '__name__': '__main__', '__doc__': None},
> > globals={'vtk': <module at remote 0x7ffff7eb70f8>, '__builtins__':
> <module at remote 0x7ffff7f79b08>, '__file__': 'test2.py', '__package__':
> None, 'sys': <module at remote 0x7ffff7f79bb0>, '__name__': '__main__',
> '__doc__': None}, co=0x7ffff7ee8db0) at ../Python/ceval.c:669
> > #23 run_mod.lto_priv () at ../Python/pythonrun.c:1370
> > #24 0x00000000004e3b02 in PyRun_FileExFlags () at
> ../Python/pythonrun.c:1356
> > #25 0x00000000004e22e6 in PyRun_SimpleFileExFlags () at
> ../Python/pythonrun.c:948
> > #26 0x0000000000490fe1 in Py_Main () at ../Modules/main.c:640
> > #27 0x00007ffff7811a40 in __libc_start_main (main=0x4909f0 <main>,
> argc=2, argv=0x7fffffffddf8, init=<optimized out>, fini=<optimized out>,
> rtld_fini=<optimized out>, stack_end=0x7fffffffdde8) at libc-start.c:289
> > #28 0x0000000000490919 in _start ()
> > Warning: the current language does not match this frame.
> > (gdb)
> >
> >
> >
> > Has anyone seen this before? I'm a little perplexed, as even a very
> simple program like:
> >
> > from PyQt4.QtGui import QApplication, QMainWindow
> >
> > from vtk.qt4.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor
> >
> > import sys
> >
> > app = QApplication(sys.argv)
> >
> > gives a segmentation fault, though in this case, the crash occurs when
> dlopen()ing /usr/lib/libkdecore.so.5 instead:
>
> Sorry, I meant breeze.so, the Qt 4 style library from KDE.
>
> In any case, I can reproduce a segfault with the tiny example above in a
> clean Ubuntu Docker container, using the packages I mentioned. I'll post
> the instructions + Dockerfile to do so as soon as I'm at work.
>
I've now filed an issue with precise instructions for reproducing:
http://www.vtk.org/Bug/view.php?id=16009
Elvis
Has really no one seen this before? Surely someone has used VTK 6.2 + PyQt4
> on Ubuntu?
>
> Elvis
>
> >
> >
> > #0 0x00007fff93d9bd4e in ?? () from /usr/lib/libkdecore.so.5
> > #1 0x00007ffff7de960a in call_init (l=<optimized out>, argc=argc at entry=2,
> argv=argv at entry=0x7fffffffddf8, env=env at entry=0x7fffffffde10) at
> dl-init.c:72
> > #2 0x00007ffff7de971b in call_init (env=<optimized out>,
> argv=<optimized out>, argc=<optimized out>, l=<optimized out>) at
> dl-init.c:30
> > #3 _dl_init (main_map=main_map at entry=0x10c4470, argc=2,
> argv=0x7fffffffddf8, env=0x7fffffffde10) at dl-init.c:120
> > #4 0x00007ffff7dee5d7 in dl_open_worker (a=a at entry=0x7fffffffc508) at
> dl-open.c:579
> > #5 0x00007ffff7de94b4 in _dl_catch_error (objname=objname at entry=0x7fffffffc4f8,
> errstring=errstring at entry=0x7fffffffc500, mallocedp=mallocedp at entry=0x7fffffffc4f7,
> operate=operate at entry=0x7ffff7dee0f0 <dl_open_worker>, args=args at entry=0x7fffffffc508)
> at dl-error.c:187
> > #6 0x00007ffff7ded9f3 in _dl_open (file=0x10d6638
> "/usr/lib/kde4/plugins/styles/breeze.so", mode=-2147483647,
> caller_dlopen=0x7ffff4f08cd6, nsid=-2, argc=<optimized out>,
> argv=<optimized out>, env=0x7fffffffde10) at dl-open.c:663
> > #7 0x00007ffff75edfc9 in dlopen_doit (a=a at entry=0x7fffffffc720) at
> dlopen.c:66
> > #8 0x00007ffff7de94b4 in _dl_catch_error (objname=0x98b920,
> errstring=0x98b928, mallocedp=0x98b918, operate=0x7ffff75edf70
> <dlopen_doit>, args=0x7fffffffc720) at dl-error.c:187
> > #9 0x00007ffff75ee62d in _dlerror_run (operate=operate at entry=0x7ffff75edf70
> <dlopen_doit>, args=args at entry=0x7fffffffc720) at dlerror.c:163
> > #10 0x00007ffff75ee061 in __dlopen (file=<optimized out>,
> mode=<optimized out>) at dlopen.c:87
> > #11 0x00007ffff4f08cd6 in ?? () from
> /usr/lib/x86_64-linux-gnu/libQtCore.so.4
> > #12 0x00007ffff4f0307d in ?? () from
> /usr/lib/x86_64-linux-gnu/libQtCore.so.4
> > #13 0x00007ffff4f0370b in ?? () from
> /usr/lib/x86_64-linux-gnu/libQtCore.so.4
> > #14 0x00007ffff4efc066 in QFactoryLoader::instance(QString const&) const
> () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
> > #15 0x00007ffff575317d in QStyleFactory::create(QString const&) () from
> /usr/lib/x86_64-linux-gnu/libQtGui.so.4
> > #16 0x00007ffff54479ce in QApplication::style() () from
> /usr/lib/x86_64-linux-gnu/libQtGui.so.4
> > #17 0x00007ffff54b910a in ?? () from
> /usr/lib/x86_64-linux-gnu/libQtGui.so.4
> > #18 0x00007ffff54bcc83 in ?? () from
> /usr/lib/x86_64-linux-gnu/libQtGui.so.4
> > #19 0x00007ffff5447fa2 in QApplicationPrivate::construct(_XDisplay*,
> unsigned long, unsigned long) () from
> /usr/lib/x86_64-linux-gnu/libQtGui.so.4
> > #20 0x00007ffff544824f in QApplication::QApplication(int&, char**, int)
> () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
> > #21 0x00007ffff64fbfae in sipQApplication::sipQApplication
> (this=0xba80d0, a0=<optimized out>, a1=<optimized out>) at
> sipQtGuipart9.cpp:36106
> > #22 0x00007ffff64fc196 in init_type_QApplication
> (sipSelf=0x7ffff1136938, sipArgs=<optimized out>, sipKwds=0x0,
> sipUnused=<optimized out>, sipParseErr=<optimized out>) at
> /build/python-qt4-DPZMhZ/python-qt4-4.11.4+dfsg/sip/QtGui/qapplication.sip:901
> > #23 0x00007ffff16901cb in sipSimpleWrapper_init (self=0x7ffff1136938,
> args=(['test.py'],), kwds=0x0) at siplib.c:9702
> > #24 0x00000000004a9efb in type_call.lto_priv () at
> ../Objects/typeobject.c:745
> > #25 0x00000000004bf3cc in PyObject_Call (kw=0x0, arg=(['test.py'],),
> func=<PyQt4.QtCore.pyqtWrapperType at remote 0xac4880>) at
> ../Objects/abstract.c:2529
> > #26 do_call (nk=<optimized out>, na=<optimized out>,
> pp_stack=0x7fffffffd9b0, func=<PyQt4.QtCore.pyqtWrapperType at remote
> 0xac4880>) at ../Python/ceval.c:4574
> > #27 call_function (oparg=<optimized out>, pp_stack=0x7fffffffd9b0) at
> ../Python/ceval.c:4379
> > #28 PyEval_EvalFrameEx () at ../Python/ceval.c:2993
> > #29 0x00000000004b7986 in PyEval_EvalCodeEx () at ../Python/ceval.c:3588
> > #30 0x00000000004e8f3f in PyEval_EvalCode (
> > locals={'QMainWindow': <PyQt4.QtCore.pyqtWrapperType at remote
> 0xb0d900>, 'QVTKRenderWindowInteractor': <PyQt4.QtCore.pyqtWrapperType at
> remote 0xba7cc0>, '__builtins__': <module at remote 0x7ffff7f79b08>,
> '__file__': 'test.py', 'QApplication': <PyQt4.QtCore.pyqtWrapperType at
> remote 0xac4880>, '__package__': None, 'sys': <module at remote
> 0x7ffff7f79bb0>, '__name__': '__main__', '__doc__': None},
> > globals={'QMainWindow': <PyQt4.QtCore.pyqtWrapperType at remote
> 0xb0d900>, 'QVTKRenderWindowInteractor': <PyQt4.QtCore.pyqtWrapperType at
> remote 0xba7cc0>, '__builtins__': <module at remote 0x7ffff7f79b08>,
> '__file__': 'test.py', 'QApplication': <PyQt4.QtCore.pyqtWrapperType at
> remote 0xac4880>, '__package__': None, 'sys': <module at remote
> 0x7ffff7f79bb0>, '__name__': '__main__', '__doc__': None},
> co=0x7ffff7edfe30) at ../Python/ceval.c:669
> > #31 run_mod.lto_priv () at ../Python/pythonrun.c:1370
> > #32 0x00000000004e3b02 in PyRun_FileExFlags () at
> ../Python/pythonrun.c:1356
> > #33 0x00000000004e22e6 in PyRun_SimpleFileExFlags () at
> ../Python/pythonrun.c:948
> > #34 0x0000000000490fe1 in Py_Main () at ../Modules/main.c:640
> > #35 0x00007ffff7811a40 in __libc_start_main (main=0x4909f0 <main>,
> argc=2, argv=0x7fffffffddf8, init=<optimized out>, fini=<optimized out>,
> rtld_fini=<optimized out>, stack_end=0x7fffffffdde8) at libc-start.c:289
> > #36 0x0000000000490919 in _start ()
> >
> >
> > Just removing the
> >
> > from vtk.qt4.QVTKRenderWindowInteractor import
> QVTKRenderWindowInteractor
> >
> > from the above minimal test and the segmentation fault goes away.
> >
> > So something seems quite broken :/
> >
> > I'm surprised, as I've had VTK + PyQt4 programs working fine before.
> >
> > Thankful for any advice / ideas.
> >
> > Elvis
>
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