OpenCV Segfault

$ g++ -ggdb bug.cpp  `pkg-config --cflags --libs opencv`
$ gdb a.out

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Reading symbols from a.out...done.

(gdb) run
Starting program: a.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00000000004d5b28 in cv::arithm_op(cv::_InputArray const&, cv::_InputArray const&, cv::_OutputArray const&, cv::_InputArray const&, int, void (**)(unsigned char const*, unsigned long, unsigned char const*, unsigned long, unsigned char*, unsigned long, cv::Size_<int>, void*), bool, void*) ()

(gdb) bt
#0  0x00000000004d5b28 in cv::arithm_op(cv::_InputArray const&, cv::_InputArray const&, cv::_OutputArray const&, cv::_InputArray const&, int, void (**)(unsigned char const*, unsigned long, unsigned char const*, unsigned long, unsigned char*, unsigned long, cv::Size_<int>, void*), bool, void*) ()
#1  0x00000000004d8650 in cv::add(cv::_InputArray const&, cv::_InputArray const&, cv::_OutputArray const&, cv::_InputArray const&, int) ()
#2  0x000000000040332c in cv::operator+= (a=..., s=...)
    at /home/tmp/opencv/install/include/opencv2/core/mat.hpp:1442
#3  0x0000000000403782 in Bug::Bug (this=0x812042 <b>) at bug.cpp:6
#4  0x000000000040338e in __static_initialization_and_destruction_0 (__initialize_p=1,
    __priority=65535) at bug.cpp:9
#5  0x00000000004033a3 in _GLOBAL__sub_I_main () at bug.cpp:10
#6  0x00000000005b5f0d in __libc_csu_init ()
#7  0x00007ffff6defe55 in __libc_start_main (main=0x403337 <main(int, char**)>, argc=1,
    argv=0x7fffffffded8, init=0x5b5ec0 <__libc_csu_init>, fini=<optimized out>,
    rtld_fini=<optimized out>, stack_end=0x7fffffffdec8) at libc-start.c:246
#8  0x00000000004031f7 in _start ()