Obtained 27 stack frames.
/usr/games/crawl-0.34(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x633f95bb98ae]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-0.34(_Z20crash_signal_handleri+0x18f) [0x633f95bb9d1f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x42910) [0x73522ee42910]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0x8f) [0x73522ee2686f]: 
/usr/games/crawl-0.34(+0x501ec2) [0x633f95bc6ec2]: 
/usr/games/crawl-0.34(_Z12AssertFailedPKcS0_iS0_z+0x1c7) [0x633f95bc73c7]: AssertFailed(char const*, char const*, int, char const*, ...)
/usr/games/crawl-0.34(_ZNK12monster_info11common_nameB5cxx11E22description_level_type+0x1424) [0x633f95fc4f24]: monster_info::common_name[abi:cxx11](description_level_type) const
/usr/games/crawl-0.34(_ZNK12monster_info11proper_nameB5cxx11E22description_level_type+0x48) [0x633f95fc5038]: monster_info::proper_name[abi:cxx11](description_level_type) const
/usr/games/crawl-0.34(_ZNK7monster4nameB5cxx11E22description_level_typebb+0xcf) [0x633f96021bcf]: monster::name[abi:cxx11](description_level_type, bool, bool) const
/usr/games/crawl-0.34(_Z15debug_item_scanv+0x6ed) [0x633f95bcd56d]: debug_item_scan()
/usr/games/crawl-0.34(_Z13do_crash_dumpv+0x199b) [0x633f95bc904b]: do_crash_dump()
/usr/games/crawl-0.34(_Z20crash_signal_handleri+0x1fa) [0x633f95bb9d8a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x42910) [0x73522ee42910]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11b) [0x73522ee9999b]: 
/lib/x86_64-linux-gnu/libc.so.6(raise+0x16) [0x73522ee42866]: 
/usr/games/crawl-0.34(+0x501ebd) [0x633f95bc6ebd]: 
/usr/games/crawl-0.34(_Z12AssertFailedPKcS0_iS0_z+0x1c7) [0x633f95bc73c7]: AssertFailed(char const*, char const*, int, char const*, ...)
/usr/games/crawl-0.34(_ZNK12monster_info11common_nameB5cxx11E22description_level_type+0x1424) [0x633f95fc4f24]: monster_info::common_name[abi:cxx11](description_level_type) const
/usr/games/crawl-0.34(_ZNK12monster_info11proper_nameB5cxx11E22description_level_type+0x48) [0x633f95fc5038]: monster_info::proper_name[abi:cxx11](description_level_type) const
/usr/games/crawl-0.34(_ZNK7monster4nameB5cxx11E22description_level_typebb+0xcf) [0x633f96021bcf]: monster::name[abi:cxx11](description_level_type, bool, bool) const
/usr/games/crawl-0.34(_Z15debug_item_scanv+0x6ed) [0x633f95bcd56d]: debug_item_scan()
/usr/games/crawl-0.34(+0xcbef3a) [0x633f96383f3a]: 
/usr/games/crawl-0.34(+0xcbfb25) [0x633f96384b25]: 
/usr/games/crawl-0.34(main+0x1f7) [0x633f95aeb2f7]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x280d0) [0x73522ee280d0]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x89) [0x73522ee28189]: 
/usr/games/crawl-0.34(_start+0x25) [0x633f95aebde5]: