The nid_patcher turns each *_nid_no_patch_cut alias into a second dynamic
symbol with the same name as the plain alias exported next to it, seven
names in all. With those duplicates, LD_DEBUG=bindings shows libstdc++ keeping its own __cxa_allocate_exception, __cxa_throw,
__cxa_begin_catch, __cxa_end_catch, __cxa_rethrow, __gxx_personality_v0
and _Unwind_Resume while taking __cxa_init_primary_exception,
_Unwind_RaiseException and std::terminate from libc.prx. An exception
thrown inside libstdc++ (std::stoi, a stream with exceptions enabled) got
a libc header laid over a libstdc++ allocation, reached the libc
personality as a foreign exception, matched no typed handler and ended in
"terminate called without an active exception". The plain aliases already
export these names, so the duplicates go.
libstdc++ also describes std::__ios_failure with __iosfail_type_info, a
class that privately derives from __si_class_type_info at the same
address. Kind now follows such single same-address bases to the
__cxxabiv1 class, so catching std::ios_base::failure or std::exception
matches a stream failure.
The plain aliases came in a4c519b26 next to the cut aliases from
14f8c16ac.
