Obtained 28 stack frames.
/usr/games/crawl-0.21(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x5d6373]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-0.21(_Z20crash_signal_handleri+0x1a5) [0x5d6715]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f41bc87e4c0]: 
/usr/games/crawl-0.21(_Z25debug_constriction_stringPK5actor+0xc7) [0x5e4537]: debug_constriction_string(actor const*)
/usr/games/crawl-0.21(_Z23debug_dump_constrictionPK5actor+0x12) [0x5e46e2]: debug_dump_constriction(actor const*)
/usr/games/crawl-0.21(_Z13do_crash_dumpv+0xecf) [0x5de0df]: do_crash_dump()
/usr/games/crawl-0.21(_Z20crash_signal_handleri+0x9c) [0x5d660c]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f41bc87e4c0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0x2b) [0x7f41bcc14b7b]: 
/usr/games/crawl-0.21() [0x5dccb9]
/usr/games/crawl-0.21() [0x5dcf81]
/usr/games/crawl-0.21(_Z16fill_status_infoiP11status_info+0x1e40) [0xa76740]: fill_status_info(int, status_info*)
/usr/games/crawl-0.21(_ZN15scorefile_entry4initEl+0x34c) [0x7130ec]: scorefile_entry::init(long)
/usr/games/crawl-0.21(_ZN15scorefile_entryC2EijiPKcbS1_l+0x16d) [0x7144ad]: scorefile_entry::scorefile_entry(int, unsigned int, int, char const*, bool, char const*, long)
/usr/games/crawl-0.21(_Z16xlog_status_linev+0x39) [0x7145c9]: xlog_status_line()
/usr/games/crawl-0.21(_Z14whereis_recordPKc+0xde) [0x5a8c8e]: whereis_record(char const*)
/usr/games/crawl-0.21(_Z9new_levelb+0x1e) [0xa5abfe]: new_level(bool)
/usr/games/crawl-0.21(_Z16floor_transition20dungeon_feature_typeS_8level_idbbbb+0x338) [0xa5b588]: floor_transition(dungeon_feature_type, dungeon_feature_type, level_id, bool, bool, bool, bool)
/usr/games/crawl-0.21(_Z11take_stairs20dungeon_feature_typebbb+0x371) [0xa5e121]: take_stairs(dungeon_feature_type, bool, bool, bool)
/usr/games/crawl-0.21() [0x540ac4]
/usr/games/crawl-0.21(_Z15activate_talentRK6talent+0x119) [0x543d29]: activate_talent(talent const&)
/usr/games/crawl-0.21(_Z16activate_abilityv+0x80) [0x544340]: activate_ability()
/usr/games/crawl-0.21(_Z15process_command12command_type+0x212) [0xbc0422]: process_command(command_type)
/usr/games/crawl-0.21() [0xbc34c9]
/usr/games/crawl-0.21() [0xbc3f9d]
/usr/games/crawl-0.21(main+0x2eb) [0xbc777b]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f41bc86976d]: 
/usr/games/crawl-0.21() [0x539219]