Re: Segmentation fault on imath import

Hi Piotr,

It happens from a vanilla python interpreter.

--
Ben

On 20/02/14 05:57, Piotr Stanczyk wrote:
> Hey,
>
> In what context are you importing? Is it from the application or does
> this happen from a vanilla python interpreter?
>
> Piotr
>
>
> On 18/02/2014, Ben Hall <[email protected]> wrote:
>> Hi,
>>
>> I have compiled openexr, ilmbase and pyilmbase 2.1.0 with gcc 4.4.3
>> (ubuntu 10.04).
>>
>> I can import iex without issue but when I import imath it segfaults.
>>
>> This occurs with python 2.6.4 and python 2.7.3 in conjunction with boost
>> 1.46.1 and 1.51.0.
>>
>> The same problem does not occur when I compile pyilmbase with gcc 4.6
>> but I need to use gcc 4.4 for compatibility with a closed source
>> application.
>>
>> The gdb backtrace is as follows:
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x00007ffff3851ff8 in std::basic_string<char, std::char_traits<char>,
>> std::allocator<char> >::basic_string(std::string const&) () from
>> /usr/lib/libstdc++.so.6
>> (gdb) bt
>> #0  0x00007ffff3851ff8 in std::basic_string<char,
>> std::char_traits<char>, std::allocator<char> >::basic_string(std::string
>> const&) () from /usr/lib/libstdc++.so.6
>> #1  0x00007ffff634dc11 in void PyIex::registerExc<Imath_2_1::NullVecExc,
>> Iex_2_1::MathExc>(std::string const&, std::string const&) ()
>>      from
>> /vol/apps/python/2.7/ext_modules/pyilmbase/2.1.0/boost/1.46.1/gcc-4.4/lib/python2.7/site-packages/imath.so
>> #2  0x00007ffff6301259 in init_module_imath() () from
>> /vol/apps/python/2.7/ext_modules/pyilmbase/2.1.0/boost/1.46.1/gcc-4.4/lib/python2.7/site-packages/imath.so
>> #3  0x00007ffff3af6f33 in boost::python::handle_exception_impl () from
>> /vol/apps/libraries/boost/1.46.1/gcc-4.4/lib/libboost_python-PY27.so.1.46.1
>> #4  0x00007ffff3af7c70 in boost::python::detail::init_module () from
>> /vol/apps/libraries/boost/1.46.1/gcc-4.4/lib/libboost_python-PY27.so.1.46.1
>> #5  0x00007ffff7b15e18 in _PyImport_LoadDynamicModule
>> (name=0x7fffffff7310 "imath", pathname=
>>       0x7fffffff6240
>> "/vol/apps/python/2.7/ext_modules/pyilmbase/2.1.0/boost/1.46.1/gcc-4.4/lib/python2.7/site-packages/imath.so",
>>
>> fp=<value optimized out>) at ./Python/importdl.c:53
>> #6  0x00007ffff7b143c5 in import_submodule (mod=None,
>> subname=0x7fffffff7310 "imath", fullname=0x7fffffff7310 "imath") at
>> Python/import.c:2595
>> #7  0x00007ffff7b1463f in load_next (mod=None, altmod=<value optimized
>> out>, p_name=<value optimized out>, buf=0x7fffffff7310 "imath",
>> p_buflen=<value optimized out>) at Python/import.c:2415
>> #8  0x00007ffff7b14ca5 in import_module_level (name=0x0,
>> globals={'__builtins__': <module at remote 0x7ffff7f7ead0>, '__name__':
>> '__main__', '__doc__': None, '__package__': None},
>>       locals=<value optimized out>, fromlist=None, level=<value optimized
>> out>) at Python/import.c:2136
>> #9  0x00007ffff7b15204 in PyImport_ImportModuleLevel (name=0x765444
>> "imath", globals={'__builtins__': <module at remote 0x7ffff7f7ead0>,
>> '__name__': '__main__', '__doc__': None, '__package__': None},
>>       locals={'__builtins__': <module at remote 0x7ffff7f7ead0>,
>> '__name__': '__main__', '__doc__': None, '__package__': None},
>> fromlist=None, level=<value optimized out>) at Python/import.c:2188
>> #10 0x00007ffff7af6d5f in builtin___import__ (self=<value optimized
>> out>, args=<value optimized out>, kwds=<value optimized out>) at
>> Python/bltinmodule.c:49
>> #11 0x00007ffff7a4c8a3 in PyObject_Call (func=<built-in function
>> __import__>, arg=<unknown at remote 0x8>, kw=<  at remote 0x7d9cf0>) at
>> Objects/abstract.c:2529
>> #12 0x00007ffff7af7223 in PyEval_CallObjectWithKeywords (func=<built-in
>> function __import__>, arg=
>>       ('imath', {'__builtins__': <module at remote 0x7ffff7f7ead0>,
>> '__name__': '__main__', '__doc__': None, '__package__': None}, {...},
>> None), kw=<  at remote 0x7d9cf0>) at Python/ceval.c:3890
>> #13 0x00007ffff7afac8d in PyEval_EvalFrameEx (f=Frame 0x7cd240, for file
>> <stdin>, line 1, in <module> (), throwflag=<value optimized out>) at
>> Python/ceval.c:2333
>> #14 0x00007ffff7aff528 in PyEval_EvalCodeEx (co=0x6f7cb0, globals=<value
>> optimized out>, locals=<value optimized out>, args=0x0, argcount=<value
>> optimized out>, kws=<value optimized out>, kwcount=0, defs=
>>       0x0, defcount=0, closure=0x0) at Python/ceval.c:3253
>> #15 0x00007ffff7aff642 in PyEval_EvalCode (co=0x7fffffff2a10,
>> globals=<unknown at remote 0x8>, locals=<  at remote 0x7d9cf0>) at
>> Python/ceval.c:667
>> #16 0x00007ffff7b1f355 in run_mod (fp=<value optimized out>,
>> filename=0x7ffff7b685ff "<stdin>", flags=0x7fffffff8860) at
>> Python/pythonrun.c:1353
>> #17 PyRun_InteractiveOneFlags (fp=<value optimized out>,
>> filename=0x7ffff7b685ff "<stdin>", flags=0x7fffffff8860) at
>> Python/pythonrun.c:852
>> #18 0x00007ffff7b1f57e in PyRun_InteractiveLoopFlags (fp=0x7ffff71566a0,
>> filename=0x7ffff7b685ff "<stdin>", flags=0x7fffffff8860) at
>> Python/pythonrun.c:772
>> #19 0x00007ffff7b1fc8c in PyRun_AnyFileExFlags (fp=0x7ffff71566a0,
>> filename=0x7ffff7b685ff "<stdin>", closeit=0, flags=0x7fffffff8860) at
>> Python/pythonrun.c:741
>> #20 0x00007ffff7b33d6e in Py_Main (argc=0, argv=<value optimized out>)
>> at Modules/main.c:639
>> #21 0x00007ffff6df7c4d in __libc_start_main (main=<value optimized out>,
>> argc=<value optimized out>, ubp_av=<value optimized out>, init=<value
>> optimized out>, fini=<value optimized out>,
>>       rtld_fini=<value optimized out>, stack_end=0x7fffffff8978) at
>> libc-start.c:226
>> #22 0x00000000004006d9 in _start ()
>>
>> Thanks for any assistance.
>>
>> --
>> Ben
>>
>>
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