debugging:: gdb :: what is src2dst?

Have anyone an idea or a link to an explanation regarding src2dst in gdb? as in :

#8  __cxxabiv1::__dynamic_cast (src_ptr=0x5aa2开发者_运维问答1d0, src_type=0x7f1e92dd5840, dst_type=0x7f1e8d2751a0, src2dst=0) at ../../../../libstdc++-v3/libsupc++/dyncast.cc:57

and related to this: what can be the cause of an dynamic cast that goes wrong? Thanks!

Are you using dynamic_cast across shared libraries with dlopen? There are special precautions to make it work. See this GCC FAQ.

src2dst seems to be a type in your case. I believe the crash you are reffering to is through the file, cxxabi.h, You can find the details of what src2dst refers to in this particular file.