Obtained 20 stack frames.
/usr/games/crawl-git-39267fd9c0(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x647075120c2e]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-39267fd9c0(_Z20crash_signal_handleri+0x18f) [0x64707512109f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x42910) [0x71d632242910]: 
/usr/games/crawl-git-39267fd9c0(_Z13handle_hangupi+0) [0x6470753e7630]: handle_hangup(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x42910) [0x71d632242910]: 
/lib/x86_64-linux-gnu/libc.so.6(wait4+0x15) [0x71d63230fbf5]: 
/usr/games/crawl-git-39267fd9c0(_Z8call_gdbP8_IO_FILE+0xec) [0x6470751212dc]: call_gdb(_IO_FILE*)
/usr/games/crawl-git-39267fd9c0(_Z13do_crash_dumpv+0x458) [0x64707512ee88]: do_crash_dump()
/usr/games/crawl-git-39267fd9c0(_Z20crash_signal_handleri+0x1fa) [0x64707512110a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x42910) [0x71d632242910]: 
/usr/games/crawl-git-39267fd9c0(_ZN20dgn_event_dispatcher10fire_eventERK9dgn_event+0xd3) [0x6470751bd093]: dgn_event_dispatcher::fire_event(dgn_event const&)
/usr/games/crawl-git-39267fd9c0(_ZN20dgn_event_dispatcher10fire_eventE14dgn_event_type+0x48) [0x6470751bd138]: dgn_event_dispatcher::fire_event(dgn_event_type)
/usr/games/crawl-git-39267fd9c0(_Z23run_environment_effectsv+0x2b) [0x6470757e07ab]: run_environment_effects()
/usr/games/crawl-git-39267fd9c0(_Z12world_reactsv+0x111) [0x6470758d3511]: world_reacts()
/usr/games/crawl-git-39267fd9c0(+0xc9ccba) [0x6470758d5cba]: 
/usr/games/crawl-git-39267fd9c0(+0xc9d7f5) [0x6470758d67f5]: 
/usr/games/crawl-git-39267fd9c0(main+0x1f7) [0x647075054077]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x280d0) [0x71d6322280d0]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x89) [0x71d632228189]: 
/usr/games/crawl-git-39267fd9c0(_start+0x25) [0x647075054b65]: