Obtained 25 stack frames.
/usr/games/crawl-git-ac9929eef6(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x5b3ca418877e]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-ac9929eef6(_Z20crash_signal_handleri+0x18f) [0x5b3ca4188bef]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x731d28df6330]: 
/usr/games/crawl-git-ac9929eef6(+0xcdf74f) [0x5b3ca497374f]: 
/usr/games/crawl-git-ac9929eef6(lua_gettable+0x5c) [0x5b3ca4964b8c]: 
/usr/games/crawl-git-ac9929eef6(_ZNK14map_lua_marker15debug_to_stringB5cxx11Ev+0x57) [0x5b3ca44b6877]: map_lua_marker::debug_to_string[abi:cxx11]() const
/usr/games/crawl-git-ac9929eef6(_Z13do_crash_dumpv+0x1d84) [0x5b3ca4198304]: do_crash_dump()
/usr/games/crawl-git-ac9929eef6(_Z20crash_signal_handleri+0x1fa) [0x5b3ca4188c5a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x731d28df6330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x731d28e4fb2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x731d28df627e]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xdf) [0x731d28dd98ff]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x297b6) [0x731d28dda7b6]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa8ff5) [0x731d28e59ff5]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xab12c) [0x731d28e5c12c]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_free+0x7e) [0x731d28e5edae]: 
/usr/games/crawl-git-ac9929eef6(+0xce7ac1) [0x5b3ca497bac1]: 
/usr/games/crawl-git-ac9929eef6(+0xcd9119) [0x5b3ca496d119]: 
/usr/games/crawl-git-ac9929eef6(+0xcde5ad) [0x5b3ca49725ad]: 
/usr/games/crawl-git-ac9929eef6(_ZN4CLua5closeEv+0xbe) [0x5b3ca416f97e]: CLua::close()
/usr/games/crawl-git-ac9929eef6(+0x2f4ffc) [0x5b3ca3f88ffc]: 
/usr/games/crawl-git-ac9929eef6(+0x2f7fc8) [0x5b3ca3f8bfc8]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca) [0x731d28ddb1ca]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b) [0x731d28ddb28b]: 
/usr/games/crawl-git-ac9929eef6(_start+0x25) [0x5b3ca40bae05]: