Obtained 25 stack frames.
/usr/games/crawl-git-fab9b65169(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x61840b483a3e]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-fab9b65169(_Z20crash_signal_handleri+0x18f) [0x61840b483eaf]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x742355d9d330]: 
/usr/games/crawl-git-fab9b65169(+0xcc518f) [0x61840bc5d18f]: 
/usr/games/crawl-git-fab9b65169(lua_gettable+0x5c) [0x61840bc4e5cc]: 
/usr/games/crawl-git-fab9b65169(_ZNK14map_lua_marker15debug_to_stringB5cxx11Ev+0x57) [0x61840b7b0487]: map_lua_marker::debug_to_string[abi:cxx11]() const
/usr/games/crawl-git-fab9b65169(_Z13do_crash_dumpv+0x1d84) [0x61840b4935c4]: do_crash_dump()
/usr/games/crawl-git-fab9b65169(_Z20crash_signal_handleri+0x1fa) [0x61840b483f1a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x742355d9d330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x742355df6b2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x742355d9d27e]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xdf) [0x742355d808ff]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x297b6) [0x742355d817b6]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa8ff5) [0x742355e00ff5]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xab12c) [0x742355e0312c]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_free+0x7e) [0x742355e05dae]: 
/usr/games/crawl-git-fab9b65169(+0xccd501) [0x61840bc65501]: 
/usr/games/crawl-git-fab9b65169(+0xcbeb59) [0x61840bc56b59]: 
/usr/games/crawl-git-fab9b65169(+0xcc3fed) [0x61840bc5bfed]: 
/usr/games/crawl-git-fab9b65169(_ZN4CLua5closeEv+0xbe) [0x61840b46ac3e]: CLua::close()
/usr/games/crawl-git-fab9b65169(+0x2f1164) [0x61840b289164]: 
/usr/games/crawl-git-fab9b65169(+0x2f3ecd) [0x61840b28becd]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca) [0x742355d821ca]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b) [0x742355d8228b]: 
/usr/games/crawl-git-fab9b65169(_start+0x25) [0x61840b3b7275]: