Comment 2 for bug 1643976

StacktraceTop:
 __gnu_cxx::__verbose_terminate_handler () at ../../../../src/libstdc++-v3/libsupc++/vterminate.cc:95
 __cxxabiv1::__terminate (handler=<optimized out>) at ../../../../src/libstdc++-v3/libsupc++/eh_terminate.cc:47
 std::terminate () at ../../../../src/libstdc++-v3/libsupc++/eh_terminate.cc:57
 __cxxabiv1::__cxa_throw (obj=obj@entry=0x55e1e432c020, tinfo=0x7fbaa32dfa98 <typeinfo for std::out_of_range>, dest=0x7fbaa300a3f0 <std::out_of_range::~out_of_range()>) at ../../../../src/libstdc++-v3/libsupc++/eh_throw.cc:87
 std::__throw_out_of_range (__s=0x7fba6ec2c974 "map::at") at ../../../../../src/libstdc++-v3/src/c++11/functexcept.cc:87