Obtained 26 stack frames.
/usr/games/crawl-git-b1822221d7(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x577581cc545e]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-b1822221d7(_Z20crash_signal_handleri+0x18f) [0x577581cc58cf]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x7493a2a11330]: 
/lib/x86_64-linux-gnu/libstdc++.so.6(_ZSt18_Rb_tree_incrementPSt18_Rb_tree_node_base+0x13) [0x7493a2dc9143]
/usr/games/crawl-git-b1822221d7(_ZN11map_markers7get_allE15map_marker_type+0x58) [0x577581ff51f8]: map_markers::get_all(map_marker_type)
/usr/games/crawl-git-b1822221d7(_Z13do_crash_dumpv+0x5cb) [0x577581cd382b]: do_crash_dump()
/usr/games/crawl-git-b1822221d7(_Z20crash_signal_handleri+0x1fa) [0x577581cc593a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x7493a2a11330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x7493a2a6ab2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x7493a2a1127e]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xdf) [0x7493a29f48ff]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x297b6) [0x7493a29f57b6]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa8ff5) [0x7493a2a74ff5]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xab12c) [0x7493a2a7712c]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_free+0x7e) [0x7493a2a79dae]: 
/usr/games/crawl-git-b1822221d7(+0xcdfa41) [0x5775824b3a41]: 
/usr/games/crawl-git-b1822221d7(+0xcd1099) [0x5775824a5099]: 
/usr/games/crawl-git-b1822221d7(+0xcce409) [0x5775824a2409]: 
/usr/games/crawl-git-b1822221d7(+0xcd07f6) [0x5775824a47f6]: 
/usr/games/crawl-git-b1822221d7(+0xcd6506) [0x5775824aa506]: 
/usr/games/crawl-git-b1822221d7(_ZN4CLua5closeEv+0xbe) [0x577581cac65e]: CLua::close()
/usr/games/crawl-git-b1822221d7(+0x2f2cce) [0x577581ac6cce]: 
/usr/games/crawl-git-b1822221d7(+0x2f5c9a) [0x577581ac9c9a]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca) [0x7493a29f61ca]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b) [0x7493a29f628b]: 
/usr/games/crawl-git-b1822221d7(_start+0x25) [0x577581bf8035]: