早上碰到这个一个错误：
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `./gh_manager thread false 1'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 __strstr_sse2_unaligned ()
at ../sysdeps/x86_64/multiarch/strstr-sse2-unaligned.S:40
40 ../sysdeps/x86_64/multiarch/strstr-sse2-unaligned.S: 没有那个文件或目录.
[Current thread is 1 (Thread 0x7f30677fe700 (LWP 26052))]
(gdb) backtrace
#0 __strstr_sse2_unaligned ()
at ../sysdeps/x86_64/multiarch/strstr-sse2-unaligned.S:40
#1 0x00007f30c61d0622 in PythonClass::process_stranger(VideoElement*, DataBuffer*) () from libgh2python.so
这个错误是由C++调用Python产生的。吾看了亦莫名其妙。怎么产生的？开始当然抱怨接口有问题．有问题也得解决啊．于是仔细查了一下：
返回值有问题（一般是Python执行错误）．
之后取值又没有仔细检查，缓冲区实际上没有正确处理．访问自然出错．
供大家参考。
