Obtained 20 stack frames.
/usr/games/crawl-git-cc2d607902(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x5aa9eaef4c2e]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-cc2d607902(_Z20crash_signal_handleri+0x18f) [0x5aa9eaef509f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x42910) [0x785340442910]: 
/usr/games/crawl-git-cc2d607902(_Z13handle_hangupi+0) [0x5aa9eb1bb630]: handle_hangup(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x42910) [0x785340442910]: 
/lib/x86_64-linux-gnu/libc.so.6(wait4+0x15) [0x78534050fbf5]: 
/usr/games/crawl-git-cc2d607902(_Z8call_gdbP8_IO_FILE+0xec) [0x5aa9eaef52dc]: call_gdb(_IO_FILE*)
/usr/games/crawl-git-cc2d607902(_Z13do_crash_dumpv+0x458) [0x5aa9eaf02e88]: do_crash_dump()
/usr/games/crawl-git-cc2d607902(_Z20crash_signal_handleri+0x1fa) [0x5aa9eaef510a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x42910) [0x785340442910]: 
/usr/games/crawl-git-cc2d607902(_ZN20dgn_event_dispatcher10fire_eventERK9dgn_event+0xd3) [0x5aa9eaf91093]: dgn_event_dispatcher::fire_event(dgn_event const&)
/usr/games/crawl-git-cc2d607902(_ZN20dgn_event_dispatcher10fire_eventE14dgn_event_type+0x48) [0x5aa9eaf91138]: dgn_event_dispatcher::fire_event(dgn_event_type)
/usr/games/crawl-git-cc2d607902(_Z23run_environment_effectsv+0x2b) [0x5aa9eb5b47ab]: run_environment_effects()
/usr/games/crawl-git-cc2d607902(_Z12world_reactsv+0x111) [0x5aa9eb6a7511]: world_reacts()
/usr/games/crawl-git-cc2d607902(+0xc9ce36) [0x5aa9eb6a9e36]: 
/usr/games/crawl-git-cc2d607902(+0xc9d7f5) [0x5aa9eb6aa7f5]: 
/usr/games/crawl-git-cc2d607902(main+0x1f7) [0x5aa9eae28077]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x280d0) [0x7853404280d0]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x89) [0x785340428189]: 
/usr/games/crawl-git-cc2d607902(_start+0x25) [0x5aa9eae28b65]: