Obtained 37 stack frames.
/usr/games/crawl-git-71f451d4b8(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x587366e85dfe]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-71f451d4b8(_Z20crash_signal_handleri+0x18f) [0x587366e8626f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x74e5f0a0d330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x74e5f0a66b2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x74e5f0a0d27e]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xdf) [0x74e5f09f08ff]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x297b6) [0x74e5f09f17b6]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa8ff5) [0x74e5f0a70ff5]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa9d68) [0x74e5f0a71d68]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xaba90) [0x74e5f0a73a90]: 
/lib/x86_64-linux-gnu/libc.so.6(malloc+0x1a2) [0x74e5f0a757f2]: 
/lib/x86_64-linux-gnu/libc.so.6(opendir+0x8c) [0x74e5f0ab560c]: 
/usr/games/crawl-git-71f451d4b8(_Z10dir_existsRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x31) [0x5873674f4921]: dir_exists(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/usr/games/crawl-git-71f451d4b8(_Z11check_mkdirRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPS4_b+0xf6) [0x587366f8fe96]: check_mkdir(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, bool)
/usr/games/crawl-git-71f451d4b8(+0x5ff39e) [0x587366f9039e]: 
/usr/games/crawl-git-71f451d4b8(_Z20get_savedir_filenameRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x3b) [0x587366f9463b]: get_savedir_filename(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/usr/games/crawl-git-71f451d4b8(_Z13do_crash_dumpv+0x255) [0x587366e93e55]: do_crash_dump()
/usr/games/crawl-git-71f451d4b8(_Z20crash_signal_handleri+0x1fa) [0x587366e862da]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x74e5f0a0d330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x74e5f0a66b2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x74e5f0a0d27e]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xdf) [0x74e5f09f08ff]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x297b6) [0x74e5f09f17b6]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa8ff5) [0x74e5f0a70ff5]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xab38c) [0x74e5f0a7338c]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_free+0x7e) [0x74e5f0a75dae]: 
/usr/games/crawl-git-71f451d4b8(+0xce85f1) [0x5873676795f1]: 
/usr/games/crawl-git-71f451d4b8(+0xcd9c49) [0x58736766ac49]: 
/usr/games/crawl-git-71f451d4b8(+0xcd6fc9) [0x587367667fc9]: 
/usr/games/crawl-git-71f451d4b8(+0xcd93a6) [0x58736766a3a6]: 
/usr/games/crawl-git-71f451d4b8(+0xcdf0b6) [0x5873676700b6]: 
/usr/games/crawl-git-71f451d4b8(_ZN4CLua5closeEv+0xbe) [0x587366e6cffe]: CLua::close()
/usr/games/crawl-git-71f451d4b8(+0x2f5554) [0x587366c86554]: 
/usr/games/crawl-git-71f451d4b8(+0x2f8520) [0x587366c89520]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca) [0x74e5f09f21ca]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b) [0x74e5f09f228b]: 
/usr/games/crawl-git-71f451d4b8(_start+0x25) [0x587366db84a5]: