Obtained 27 stack frames.
/usr/games/crawl-git-903b2947ba(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x60da2a4078fe]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-903b2947ba(_Z20crash_signal_handleri+0x18f) [0x60da2a407d6f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x77f4f279c330]: 
/usr/games/crawl-git-903b2947ba(+0xcd5721) [0x60da2abea721]: 
/usr/games/crawl-git-903b2947ba(+0xcd5b07) [0x60da2abeab07]: 
/usr/games/crawl-git-903b2947ba(lua_getglobal+0x22) [0x60da2abdc192]: 
/usr/games/crawl-git-903b2947ba(_ZN4CLua10pushglobalERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x16d) [0x60da2a3ebc6d]: CLua::pushglobal(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/usr/games/crawl-git-903b2947ba(_ZN4CLua6callfnEPKcii+0x80) [0x60da2a3ee1e0]: CLua::callfn(char const*, int, int)
/usr/games/crawl-git-903b2947ba(_Z13do_crash_dumpv+0x1b84) [0x60da2a417284]: do_crash_dump()
/usr/games/crawl-git-903b2947ba(_Z20crash_signal_handleri+0x1fa) [0x60da2a407dda]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x77f4f279c330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x77f4f27f5b2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x77f4f279c27e]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xdf) [0x77f4f277f8ff]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x297b6) [0x77f4f27807b6]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa8ff5) [0x77f4f27ffff5]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xab12c) [0x77f4f280212c]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_free+0x7e) [0x77f4f2804dae]: 
/usr/games/crawl-git-903b2947ba(+0xcde1c1) [0x60da2abf31c1]: 
/usr/games/crawl-git-903b2947ba(+0xccf819) [0x60da2abe4819]: 
/usr/games/crawl-git-903b2947ba(+0xcd4cad) [0x60da2abe9cad]: 
/usr/games/crawl-git-903b2947ba(_ZN4CLua5closeEv+0xbe) [0x60da2a3eeafe]: CLua::close()
/usr/games/crawl-git-903b2947ba(+0x2f3410) [0x60da2a208410]: 
/usr/games/crawl-git-903b2947ba(+0x2f63dc) [0x60da2a20b3dc]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca) [0x77f4f27811ca]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b) [0x77f4f278128b]: 
/usr/games/crawl-git-903b2947ba(_start+0x25) [0x60da2a339675]: