python module segment fault when import

[caron-lee]

import mxnet * glibc detected * python2.7: free(): invalid pointer: 0x00007fcf34b68880 *** ======= Backtrace: ========= /lib64/libc.so.6[0x39e4675f4e] /lib64/libc.so.6[0x39e4678cad] /usr/local/lib/python2.7/site-packages/cv2.so(+0x126fe7)[0x7fcf2aa95fe7] /usr/local/lib/python2.7/site-packages/cv2.so(initcv2+0x23fa)[0x7fcf2ab2179a] python2.7(_PyImport_LoadDynamicModule+0xc5)[0x4b56d5] python2.7[0x4b3d51] python2.7[0x4b3fc4] python2.7(PyImport_ImportModuleLevel+0x1f0)[0x4b45f0] python2.7[0x49693f] python2.7(PyObject_Call+0x53)[0x41abc3] python2.7(PyEval_CallObjectWithKeywords+0x43)[0x496e23] python2.7(PyEval_EvalFrameEx+0x35e6)[0x49b326] python2.7(PyEval_EvalCodeEx+0x88e)[0x49f1ee] python2.7(PyEval_EvalCode+0x32)[0x49f302] python2.7(PyImport_ExecCodeModuleEx+0xc2)[0x4b0862] python2.7[0x4b2f9e] python2.7[0x4b3d51] python2.7[0x4b428c] python2.7(PyImport_ImportModuleLevel+0x32c)[0x4b472c] python2.7[0x49693f] python2.7(PyObject_Call+0x53)[0x41abc3] python2.7(PyEval_CallObjectWithKeywords+0x43)[0x496e23] python2.7(PyEval_EvalFrameEx+0x35e6)[0x49b326] python2.7(PyEval_EvalCodeEx+0x88e)[0x49f1ee] python2.7(PyEval_EvalCode+0x32)[0x49f302] python2.7(PyImport_ExecCodeModuleEx+0xc2)[0x4b0862] python2.7[0x4b2f9e] python2.7[0x4b37fa] python2.7[0x4b3d51] python2.7[0x4b3fc4] python2.7(PyImport_ImportModuleLevel+0x1f0)[0x4b45f0] python2.7[0x49693f] python2.7(PyObject_Call+0x53)[0x41abc3] python2.7(PyEval_CallObjectWithKeywords+0x43)[0x496e23] python2.7(PyEval_EvalFrameEx+0x35e6)[0x49b326] python2.7(PyEval_EvalCodeEx+0x88e)[0x49f1ee] python2.7(PyEval_EvalCode+0x32)[0x49f302] python2.7(PyRun_InteractiveOneFlags+0x195)[0x4bea55] python2.7(PyRun_InteractiveLoopFlags+0x4e)[0x4bec6e] python2.7(PyRun_AnyFileExFlags+0x4c)[0x4bf3ac] python2.7(Py_Main+0xc74)[0x416474] /lib64/libc.so.6(__libc_start_main+0xfd)[0x39e461ed5d] python2.7[0x4153e9] ======= Memory map: ======== 00400000-00566000 r-xp 00000000 08:02 1720681 /usr/local/bin/python2.7 00766000-007a3000 rw-p 00166000 08:02 1720681 /usr/local/bin/python2.7 007a3000-007b2000 rw-p 00000000 00:00 0 010ed000-01610000 rw-p 00000000 00:00 0 [heap] 371bc00000-371bc3f000 r-xp 00000000 08:02 1723269 /usr/lib64/libjpeg.so.62 371bc3f000-371be3f000 ---p 0003f000 08:02 1723269 /usr/lib64/libjpeg.so.62 371be3f000-371be40000 rw-p 0003f000 08:02 1723269 /usr/lib64/libjpeg.so.62 371be40000-371be50000 rw-p 00000000 00:00 0 371c000000-371c1b9000 r-xp 00000000 08:02 1715861 /usr/lib64/libcrypto.so.10 371c1b9000-371c3b8000 ---p 001b9000 08:02 1715861 /usr/lib64/libcrypto.so.10 371c3b8000-371c3d3000 r--p 001b8000 08:02 1715861 /usr/lib64/libcrypto.so.10 371c3d3000-371c3df000 rw-p 001d3000 08:02 1715861 /usr/lib64/libcrypto.so.10 371c3df000-371c3e3000 rw-p 00000000 00:00 0 371d400000-371d425000 r-xp 00000000 08:02 1705511 /usr/lib64/libpng12.so.0 371d425000-371d625000 ---p 00025000 08:02 1705511 /usr/lib64/libpng12.so.0 371d625000-371d626000 rw-p 00025000 08:02 1705511 /usr/lib64/libpng12.so.0 371f000000-371f062000 r-xp 00000000 08:02 1738097 /usr/lib64/libssl.so.10 371f062000-371f261000 ---p 00062000 08:02 1738097 /usr/lib64/libssl.so.10 371f261000-371f265000 r--p 00061000 08:02 1738097 /usr/lib64/libssl.so.10 371f265000-371f26c000 rw-p 00065000 08:02 1738097 /usr/lib64/libssl.so.10 39e4200000-39e4220000 r-xp 00000000 08:02 1441820 /lib64/ld-2.12.so 39e441f000-39e4420000 r--p 0001f000 08:02 1441820 /lib64/ld-2.12.so 39e4420000-39e4421000 rw-p 00020000 08:02 1441820 /lib64/ld-2.12.so 39e4421000-39e4422000 rw-p 00000000 00:00 0 39e4600000-39e478a000 r-xp 00000000 08:02 1441822 /lib64/libc-2.12.so 39e478a000-39e498a000 ---p 0018a000 08:02 1441822 /lib64/libc-2.12.so 39e498a000-39e498e000 r--p 0018a000 08:02 1441822 /lib64/libc-2.12.so 39e498e000-39e498f000 rw-p 0018e000 08:02 1441822 /lib64/libc-2.12.so 39e498f000-39e4994000 rw-p 00000000 00:00 0 39e4a00000-39e4a17000 r-xp 00000000 08:02 1441862 /lib64/libpthread-2.12.so 39e4a17000-39e4c17000 ---p 00017000 08:02 1441862 /lib64/libpthread-2.12.so 39e4c17000-39e4c18000 r--p 00017000 08:02 1441862 /lib64/libpthread-2.12.so 39e4c18000-39e4c19000 rw-p 00018000 08:02 1441862 /lib64/libpthread-2.12.so 39e4c19000-39e4c1d000 rw-p 00000000 00:00 0 39e4e00000-39e4e02000 r-xp 00000000 08:02 1441896 /lib64/libdl-2.12.so 39e4e02000-39e5002000 ---p 00002000 08:02 1441896 /lib64/libdl-2.12.so 39e5002000-39e5003000 r--p 00002000 08:02 1441896 /lib64/libdl-2.12.so 39e5003000-39e5004000 rw-p 00003000 08:02 1441896 /lib64/libdl-2.12.so 39e5200000-39e5202000 r-xp 00000000 08:02 1442149 /lib64/libutil-2.12.so 39e5202000-39e5401000 ---p 00002000 08:02 1442149 /lib64/libutil-2.12.so 39e5401000-39e5402000 r--p 00001000 08:02 1442149 /lib64/libutil-2.12.so 39e5402000-39e5403000 rw-p 00002000 08:02 1442149 /lib64/libutil-2.12.so 39e5600000-39e5615000 r-xp 00000000 08:02 1442264 /lib64/libz.so.1.2.3 39e5615000-39e5814000 ---p 00015000 08:02 1442264 /lib64/libz.so.1.2.3 39e5814000-39e5815000 r--p 00014000 08:02 1442264 /lib64/libz.so.1.2.3 39e5815000-39e5816000 rw-p 00015000 08:02 1442264 /lib64/libz.so.1.2.3 39e5a00000-39e5a83000 r-xp 00000000 08:02 1442270 /lib64/libm-2.12.so 39e5a83000-39e5c82000 ---p 00083000 08:02 1442270 /lib64/libm-2.12.so 39e5c82000-39e5c83000 r--p 00082000 08:02 1442270 /lib64/libm-2.12.so 39e5c83000-39e5c84000 rw-p 00083000 08:02 1442270 /lib64/libm-2.12.so 39e5e00000-39e5e22000 r-xp 00000000 08:02 1441845 /lib64/libncurses.so.5.7 39e5e22000-39e6021000 ---p 00022000 08:02 1441845 /lib64/libncurses.so.5.7 39e6021000-39e6022000 rw-p 00021000 08:02 1441845 /lib64/libncurses.so.5.7 39e6200000-39e621d000 r-xp 00000000 08:02 1441883 /lib64/libtinfo.so.5.7 39e621d000-39e641c000 ---p 0001d000 08:02 1441883 /lib64/libtinfo.so.5.7 39e641c000-39e6420000 rw-p 0001c000 08:02 1441883 /lib64/libtinfo.so.5.7 39e6420000-39e6421000 rw-p 00000000 00:00 0 39e7a00000-39e7a16000 r-xp 00000000 08:02 1441916 /lib64/libresolv-2.12.so 39e7a16000-39e7c16000 ---p 00016000 08:02 1441916 /lib64/libresolv-2.12.so 39e7c16000-39e7c17000 r--p 00016000 08:02 1441916 /lib64/libresolv-2.12.so 39e7c17000-39e7c18000 rw-p 00017000 08:02 1441916 /lib64/libresolv-2.12.so 39e7c18000-39e7c1a000 rw-p 00000000 00:00 0 39eaa00000-39eaa03000 r-xp 00000000 08:02 1442025 /lib64/libcom_err.so.2.1 39eaa03000-39eac02000 ---p 00003000 08:02 1442025 /lib64/libcom_err.so.2.1 39eac02000-39eac03000 r--p 00002000 08:02 1442025 /lib64/libcom_err.so.2.1 39eac03000-39eac04000 rw-p 00003000 08:02 1442025 /lib64/libcom_err.so.2.1 39eca00000-39ecadb000 r-xp 00000000 08:02 1442155 /lib64/libkrb5.so.3.3Aborted (core dumped)

[caron-lee]

opencv 2.4.11 and opencv 3.0 both tried, but failed.

[caron-lee]

gdb python2.7 core.xxxx , bt information: 0 0x00000039e4632625 in raise () from /lib64/libc.so.6

1 0x00000039e4633e05 in abort () from /lib64/libc.so.6

2 0x00000039e4670537 in **libc_message () from /lib64/libc.so.6

3 0x00000039e4675f4e in malloc_printerr () from /lib64/libc.so.6

4 0x00000039e4678cad in _int_free () from /lib64/libc.so.6

5 0x00007fc57bf7efe7 in init_submodule(object, char const, PyMethodDef, ConstDef_) () from /usr/local/lib/python2.7/site-packages/cv2.so

6 0x00007fc57c00a79a in initcv2 () from /usr/local/lib/python2.7/site-packages/cv2.so

7 0x00000000004b56d5 in _PyImport_LoadDynamicModule (name=0x1090340 "cv2", pathname=0x1091350 "/usr/local/lib/python2.7/site-packages/cv2.so", fp=) at ./Python/importdl.c:53

8 0x00000000004b3d51 in import_submodule (mod=0x773bb0, subname=0x1090340 "cv2", fullname=0x1090340 "cv2") at Python/import.c:2700

9 0x00000000004b3fc4 in load_next (mod=0x773bb0, altmod=0x773bb0, p_name=, buf=0x1090340 "cv2", p_buflen=0x7fff5a85f110) at Python/import.c:2515

10 0x00000000004b45f0 in import_module_level (name=, globals=, locals=, fromlist=0x773bb0, level=) at Python/import.c:2224

11 PyImport_ImportModuleLevel (name=, globals=, locals=, fromlist=0x773bb0, level=) at Python/import.c:2288

12 0x000000000049693f in builtin___import** (self=, args=, kwds=) at Python/bltinmodule.c:49

13 0x000000000041abc3 in PyObject_Call (func=0x7fc590533050, arg=, kw=) at Objects/abstract.c:2529

14 0x0000000000496e23 in PyEval_CallObjectWithKeywords (func=0x7fc590533050, arg=0x7fc57cfd18f0, kw=) at Python/ceval.c:3902

15 0x000000000049b326 in PyEval_EvalFrameEx (f=, throwflag=) at Python/ceval.c:2346

16 0x000000000049f1ee in PyEval_EvalCodeEx (co=0x7fc57cf71d30, globals=, locals=, args=, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:3265

17 0x000000000049f302 in PyEval_EvalCode (co=, globals=, locals=) at Python/ceval.c:673

18 0x00000000004b0862 in PyImport_ExecCodeModuleEx (name=0xcbc8f0 "mxnet.recordio", co=0x7fc57cf71d30, pathname=0x108d960 "/usr/local/lib/python2.7/site-packages/mxnet-0.5.0-py2.7.egg/mxnet/recordio.pyc") at Python/import.c:709

19 0x00000000004b2f9e in load_source_module (name=0xcbc8f0 "mxnet.recordio", pathname=0x108d960 "/usr/local/lib/python2.7/site-packages/mxnet-0.5.0-py2.7.egg/mxnet/recordio.pyc", fp=) at Python/import.c:1099

20 0x00000000004b3d51 in import_submodule (mod=0x7fc590403b08, subname=0x7fc590404ad4 "recordio", fullname=0xcbc8f0 "mxnet.recordio") at Python/import.c:2700

21 0x00000000004b428c in ensure_fromlist (mod=0x7fc590403b08, fromlist=0x7fc5903ff950, buf=0xcbc8f0 "mxnet.recordio", buflen=5, recursive=0) at Python/import.c:2606

22 0x00000000004b472c in import_module_level (name=, globals=, locals=, fromlist=0x7fc5903ff950, level=) at Python/import.c:2269

23 PyImport_ImportModuleLevel (name=, globals=, locals=, fromlist=0x7fc5903ff950, level=) at Python/import.c:2288

24 0x000000000049693f in builtin_import (self=, args=, kwds=) at Python/bltinmodule.c:49

25 0x000000000041abc3 in PyObject_Call (func=0x7fc590533050, arg=, kw=) at Objects/abstract.c:2529

26 0x0000000000496e23 in PyEval_CallObjectWithKeywords (func=0x7fc590533050, arg=0x7fc5904d6170, kw=) at Python/ceval.c:3902

27 0x000000000049b326 in PyEval_EvalFrameEx (f=, throwflag=) at Python/ceval.c:2346

28 0x000000000049f1ee in PyEval_EvalCodeEx (co=0x7fc5903e5f30, globals=, locals=, args=, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:3265

29 0x000000000049f302 in PyEval_EvalCode (co=, globals=, locals=) at Python/ceval.c:673

30 0x00000000004b0862 in PyImport_ExecCodeModuleEx (name=0xcb88b0 "mxnet", co=0x7fc5903e5f30, pathname=0xcbb8e0 "/usr/local/lib/python2.7/site-packages/mxnet-0.5.0-py2.7.egg/mxnet/init.pyc") at Python/import.c:709

31 0x00000000004b2f9e in load_source_module (name=0xcb88b0 "mxnet", pathname=0xcbb8e0 "/usr/local/lib/python2.7/site-packages/mxnet-0.5.0-py2.7.egg/mxnet/init.pyc", fp=) at Python/import.c:1099

32 0x00000000004b37fa in load_package (name=0xcb88b0 "mxnet", pathname=) at Python/import.c:1166

33 0x00000000004b3d51 in import_submodule (mod=0x773bb0, subname=0xcb88b0 "mxnet", fullname=0xcb88b0 "mxnet") at Python/import.c:2700

34 0x00000000004b3fc4 in load_next (mod=0x773bb0, altmod=0x773bb0, p_name=, buf=0xcb88b0 "mxnet", p_buflen=0x7fff5a85fc70) at Python/import.c:2515

35 0x00000000004b45f0 in import_module_level (name=, globals=, locals=, fromlist=0x773bb0, level=) at Python/import.c:2224

36 PyImport_ImportModuleLevel (name=, globals=, locals=, fromlist=0x773bb0, level=) at Python/import.c:2288

37 0x000000000049693f in builtin_import (self=, args=, kwds=) at Python/bltinmodule.c:49

38 0x000000000041abc3 in PyObject_Call (func=0x7fc590533050, arg=, kw=) at Objects/abstract.c:2529

39 0x0000000000496e23 in PyEval_CallObjectWithKeywords (func=0x7fc590533050, arg=0x7fc59041b998, kw=) at Python/ceval.c:3902

40 0x000000000049b326 in PyEval_EvalFrameEx (f=, throwflag=) at Python/ceval.c:2346

41 0x000000000049f1ee in PyEval_EvalCodeEx (co=0x7fc5903e5db0, globals=, locals=, args=, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:3265

42 0x000000000049f302 in PyEval_EvalCode (co=, globals=, locals=) at Python/ceval.c:673

43 0x00000000004bea55 in run_mod (fp=, filename=0x51b824 "", flags=0x7fff5a860170) at Python/pythonrun.c:1377

44 PyRun_InteractiveOneFlags (fp=, filename=0x51b824 "", flags=0x7fff5a860170) at Python/pythonrun.c:864

45 0x00000000004bec6e in PyRun_InteractiveLoopFlags (fp=0x39e498e6c0, filename=0x51b824 "", flags=0x7fff5a860170) at Python/pythonrun.c:784

46 0x00000000004bf3ac in PyRun_AnyFileExFlags (fp=0x39e498e6c0, filename=0x51b824 "", closeit=0, flags=0x7fff5a860170) at Python/pythonrun.c:753

47 0x0000000000416474 in Py_Main (argc=, argv=) at Modules/main.c:640

48 0x00000039e461ed5d in __libc_start_main () from /lib64/libc.so.6

49 0x00000000004153e9 in _start ()

[caron-lee]

$ python2.7 Python 2.7.8 (default, Nov 14 2015, 21:59:15) [GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux2 Type "help", "copyright", "credits" or "license" for more information.

import cv2

import opencv alone is ok.

[caron-lee]

$ python2.7 Python 2.7.8 (default, Nov 14 2015, 21:59:15) [GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux2 Type "help", "copyright", "credits" or "license" for more information.

import cv2 import mxnet

import opencv first is ok. The order matters.

[piiswrong]

Both order works for me. Could you update to newest mxnet and rebuild?

[caron-lee]

I fixed the problem. I changed compile option of OpenCV from BUILD_SHARED_LIBS=OFF to BUILD_SHARED_LIBS=ON. that's all.