Obtained 21 stack frames.
/usr/games/crawl-git-3b32ff54d1(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x66f2e3]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-git-3b32ff54d1(_Z20crash_signal_handleri+0x174) [0x66f654]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x321e0) [0x7f1fb6ee61e0]: 
/usr/games/crawl-git-3b32ff54d1() [0x84f200]
/lib/x86_64-linux-gnu/libc.so.6(+0x321e0) [0x7f1fb6ee61e0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(waitpid+0x1c) [0x7f1fb724ec4c]: 
/usr/games/crawl-git-3b32ff54d1(_Z8call_gdbP8_IO_FILE+0x1c3) [0x66f9a3]: call_gdb(_IO_FILE*)
/usr/games/crawl-git-3b32ff54d1(_Z13do_crash_dumpv+0x2d1) [0x675fb1]: do_crash_dump()
/usr/games/crawl-git-3b32ff54d1(_Z20crash_signal_handleri+0x74) [0x66f554]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x321e0) [0x7f1fb6ee61e0]: 
/usr/games/crawl-git-3b32ff54d1(_Z17mons_allows_beoghRK7monster+0x1c) [0x97640c]: mons_allows_beogh(monster const&)
/usr/games/crawl-git-3b32ff54d1(_Z21mons_allows_beogh_nowRK7monster+0x9) [0x9783f9]: mons_allows_beogh_now(monster const&)
/usr/games/crawl-git-3b32ff54d1(_Z20can_convert_to_beoghv+0x5e) [0x7458be]: can_convert_to_beogh()
/usr/games/crawl-git-3b32ff54d1(_Z16fill_status_infoiP11status_info+0x7d2) [0xacb552]: fill_status_info(int, status_info*)
/usr/games/crawl-git-3b32ff54d1() [0x9d537e]
/usr/games/crawl-git-3b32ff54d1(_Z11print_statsv+0x54b) [0x9d5a0b]: print_stats()
/usr/games/crawl-git-3b32ff54d1(_Z12startup_stepv+0xb2b) [0xab7bbb]: startup_step()
/usr/games/crawl-git-3b32ff54d1() [0xba1d56]
/usr/games/crawl-git-3b32ff54d1(main+0x2eb) [0x5de36b]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f1fb6ed2ead]: 
/usr/games/crawl-git-3b32ff54d1() [0x5de9cd]