Obtained 33 stack frames.
/usr/games/crawl-git-830d4154b1(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x60bce9c0a99e]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-830d4154b1(_Z20crash_signal_handleri+0x18f) [0x60bce9c0ae0f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x71923aa4b330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x71923aaa4b2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x71923aa4b27e]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xdf) [0x71923aa2e8ff]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x297b6) [0x71923aa2f7b6]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa8ff5) [0x71923aaaeff5]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa9b7c) [0x71923aaafb7c]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa9cda) [0x71923aaafcda]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xaba90) [0x71923aab1a90]: 
/lib/x86_64-linux-gnu/libc.so.6(malloc+0x1a2) [0x71923aab37f2]: 
/lib/x86_64-linux-gnu/libc.so.6(opendir+0x8c) [0x71923aaf360c]: 
/usr/games/crawl-git-830d4154b1(_Z10dir_existsRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x31) [0x60bcea271bd1]: dir_exists(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/usr/games/crawl-git-830d4154b1(_Z11check_mkdirRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPS4_b+0xf6) [0x60bce9d13f76]: 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-830d4154b1(+0x5f547e) [0x60bce9d1447e]: 
/usr/games/crawl-git-830d4154b1(_Z20get_savedir_filenameRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x3b) [0x60bce9d186db]: get_savedir_filename(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/usr/games/crawl-git-830d4154b1(_Z13do_crash_dumpv+0x255) [0x60bce9c189f5]: do_crash_dump()
/usr/games/crawl-git-830d4154b1(_Z20crash_signal_handleri+0x1fa) [0x60bce9c0ae7a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x71923aa4b330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x71923aaa4b2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x71923aa4b27e]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xdf) [0x71923aa2e8ff]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x297b6) [0x71923aa2f7b6]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa8ff5) [0x71923aaaeff5]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xab38c) [0x71923aab138c]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_free+0x7e) [0x71923aab3dae]: 
/usr/games/crawl-git-830d4154b1(_ZN13message_store5clearEv+0x89) [0x60bce9f7ab29]: message_store::clear()
/usr/games/crawl-git-830d4154b1(+0x2f114a) [0x60bce9a1014a]: 
/usr/games/crawl-git-830d4154b1(+0x2f3e9d) [0x60bce9a12e9d]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca) [0x71923aa301ca]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b) [0x71923aa3028b]: 
/usr/games/crawl-git-830d4154b1(_start+0x25) [0x60bce9b3e245]: