Backtrace from promise example

promise_backtrace.txt

Starting program: /tmp/a.out 
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py", line 63, in <module>
    from libstdcxx.v6.printers import register_libstdcxx_printers
ImportError: No module named 'libstdcxx'
terminate called after throwing an instance of 'std::system_error'
  what():  Unknown error -1

Program received signal SIGABRT, Aborted.
0x00007ffff7531cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56	../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  0x00007ffff7531cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007ffff75350d8 in __GI_abort () at abort.c:89
#2  0x00007ffff7b36535 in __gnu_cxx::__verbose_terminate_handler() ()
   from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#3  0x00007ffff7b346d6 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#4  0x00007ffff7b34703 in std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#5  0x00007ffff7b34922 in __cxa_throw () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#6  0x00007ffff7b867e0 in std::__throw_system_error(int) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#7  0x0000000000402648 in std::call_once<void (std::__future_base::_State_base::*)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>&, bool&), std::__future_base::_State_base* const, std::reference_wrapper<std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()> >, std::reference_wrapper<bool> >(std::once_flag&, void (std::__future_base::_State_base::*&&)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>&, bool&), std::__future_base::_State_base* const&&, std::reference_wrapper<std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()> >&&, std::reference_wrapper<bool>&&) (__once=..., __f=<unknown type in /tmp/a.out, CU 0x0, DIE 0xe32f>) at /usr/include/c++/4.8/mutex:794
#8  0x0000000000401ea8 in std::__future_base::_State_base::_M_set_result(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>, bool) (this=0x60b028, __res=..., 
    __ignore_failure=false) at /usr/include/c++/4.8/future:358
---Type <return> to continue, or q <return> to quit---
#9  0x0000000000402c43 in std::promise<int>::set_value(int&&) (this=0x7fffffffdc10, 
    __r=<unknown type in /tmp/a.out, CU 0x0, DIE 0xeb70>) at /usr/include/c++/4.8/future:997
#10 0x0000000000401943 in main () at broken_promise.cpp:12