Obtained 40 stack frames.
/usr/games/crawl-git-903b2947ba(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x55928adfb8fe]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-903b2947ba(_Z20crash_signal_handleri+0x18f) [0x55928adfbd6f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x745118c5d330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x745118cb6b2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x745118c5d27e]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xdf) [0x745118c408ff]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x297b6) [0x745118c417b6]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa8ff5) [0x745118cc0ff5]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xad13c) [0x745118cc513c]: 
/lib/x86_64-linux-gnu/libc.so.6(realloc+0x255) [0x745118cc62f5]: 
/usr/games/crawl-git-903b2947ba(+0xccf854) [0x55928b5d8854]: 
/usr/games/crawl-git-903b2947ba(+0xcca7b5) [0x55928b5d37b5]: 
/usr/games/crawl-git-903b2947ba(+0xccb622) [0x55928b5d4622]: 
/usr/games/crawl-git-903b2947ba(+0xccb834) [0x55928b5d4834]: 
/usr/games/crawl-git-903b2947ba(+0xcca693) [0x55928b5d3693]: 
/usr/games/crawl-git-903b2947ba(+0xccbc74) [0x55928b5d4c74]: 
/usr/games/crawl-git-903b2947ba(lua_pcallk+0x95) [0x55928b5d0f25]: 
/usr/games/crawl-git-903b2947ba(_ZN4CLua5pcallEii+0x60) [0x55928ade08f0]: CLua::pcall(int, int)
/usr/games/crawl-git-903b2947ba(_ZN4CLua6callfnEPKcii+0xb4) [0x55928ade2214]: CLua::callfn(char const*, int, int)
/usr/games/crawl-git-903b2947ba(_Z13do_crash_dumpv+0x1b84) [0x55928ae0b284]: do_crash_dump()
/usr/games/crawl-git-903b2947ba(_Z20crash_signal_handleri+0x1fa) [0x55928adfbdda]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x745118c5d330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x745118cb6b2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x745118c5d27e]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xdf) [0x745118c408ff]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x297b6) [0x745118c417b6]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa8ff5) [0x745118cc0ff5]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xab38c) [0x745118cc338c]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_free+0x7e) [0x745118cc5dae]: 
/usr/games/crawl-git-903b2947ba(+0x4d4c4e) [0x55928adddc4e]: 
/usr/games/crawl-git-903b2947ba(+0xccf819) [0x55928b5d8819]: 
/usr/games/crawl-git-903b2947ba(+0xcd611f) [0x55928b5df11f]: 
/usr/games/crawl-git-903b2947ba(+0xccef76) [0x55928b5d7f76]: 
/usr/games/crawl-git-903b2947ba(+0xcd4c86) [0x55928b5ddc86]: 
/usr/games/crawl-git-903b2947ba(_ZN4CLua5closeEv+0xbe) [0x55928ade2afe]: CLua::close()
/usr/games/crawl-git-903b2947ba(+0x2f3404) [0x55928abfc404]: 
/usr/games/crawl-git-903b2947ba(+0x2f63dc) [0x55928abff3dc]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca) [0x745118c421ca]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b) [0x745118c4228b]: 
/usr/games/crawl-git-903b2947ba(_start+0x25) [0x55928ad2d675]: