Obtained 25 stack frames.
/usr/games/crawl-bloaxcrawl(_Z17write_stack_traceP8_IO_FILEi+0x2d) [0x821955]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-bloaxcrawl(_Z20crash_signal_handleri+0x23a) [0x8216ff]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7fa5db4794c0]: 
/usr/games/crawl-bloaxcrawl(_ZNKSt4lessI20dungeon_feature_typeEclERKS0_S3_+0x14) [0x8a582c]: std::less<dungeon_feature_type>::operator()(dungeon_feature_type const&, dungeon_feature_type const&) const
/usr/games/crawl-bloaxcrawl(_ZNKSt8_Rb_treeI20dungeon_feature_typeSt4pairIKS0_SsESt10_Select1stIS3_ESt4lessIS0_ESaIS3_EE14_M_lower_boundEPKSt13_Rb_tree_nodeIS3_ESD_RS2_+0x3c) [0x8a5796]: std::_Rb_tree<dungeon_feature_type, std::pair<dungeon_feature_type const, std::string>, std::_Select1st<std::pair<dungeon_feature_type const, std::string> >, std::less<dungeon_feature_type>, std::allocator<std::pair<dungeon_feature_type const, std::string> > >::_M_lower_bound(std::_Rb_tree_node<std::pair<dungeon_feature_type const, std::string> > const*, std::_Rb_tree_node<std::pair<dungeon_feature_type const, std::string> > const*, dungeon_feature_type const&) const
/usr/games/crawl-bloaxcrawl(_ZNKSt8_Rb_treeI20dungeon_feature_typeSt4pairIKS0_SsESt10_Select1stIS3_ESt4lessIS0_ESaIS3_EE4findERS2_+0x45) [0x8a48fd]: std::_Rb_tree<dungeon_feature_type, std::pair<dungeon_feature_type const, std::string>, std::_Select1st<std::pair<dungeon_feature_type const, std::string> >, std::less<dungeon_feature_type>, std::allocator<std::pair<dungeon_feature_type const, std::string> > >::find(dungeon_feature_type const&) const
/usr/games/crawl-bloaxcrawl(_ZNKSt3mapI20dungeon_feature_typeSsSt4lessIS0_ESaISt4pairIKS0_SsEEE4findERS4_+0x23) [0x8a39e3]: std::map<dungeon_feature_type, std::string, std::less<dungeon_feature_type>, std::allocator<std::pair<dungeon_feature_type const, std::string> > >::find(dungeon_feature_type const&) const
/usr/games/crawl-bloaxcrawl(_Z23raw_feature_descriptionRK9coord_def+0x7c) [0x89deb4]: raw_feature_description(coord_def const&)
/usr/games/crawl-bloaxcrawl() [0x829154]
/usr/games/crawl-bloaxcrawl(_Z13do_crash_dumpv+0x5a9) [0x82b485]: do_crash_dump()
/usr/games/crawl-bloaxcrawl(_Z20crash_signal_handleri+0x2c1) [0x821786]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7fa5db4794c0]: 
/lib/x86_64-linux-gnu/libc.so.6(__write+0x10) [0x7fa5db528100]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_write+0x43) [0x7fa5db4bc313]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x791da) [0x7fa5db4bc1da]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_xsputn+0x23e) [0x7fa5db4bcc8e]: 
/lib/x86_64-linux-gnu/libc.so.6(fputs+0x9d) [0x7fa5db4b207d]: 
/usr/games/crawl-bloaxcrawl(_Z3endibPKcz+0x382) [0x8ec0bf]: end(int, bool, char const*, ...)
/usr/games/crawl-bloaxcrawl(_Z9save_gamebPKc+0x1ab) [0x9083bb]: save_game(bool, char const*)
/usr/games/crawl-bloaxcrawl() [0xa68ff0]
/usr/games/crawl-bloaxcrawl() [0xa66cd9]
/usr/games/crawl-bloaxcrawl() [0xa66959]
/usr/games/crawl-bloaxcrawl(main+0x197) [0xa667e1]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7fa5db46476d]: 
/usr/games/crawl-bloaxcrawl() [0x7570f9]