Obtained 24 stack frames.
/usr/games/crawl-git-008097b4cb(_Z17write_stack_traceP8_IO_FILE+0x3f) [0x55b4aac1359f]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-008097b4cb(_Z20crash_signal_handleri+0x18f) [0x55b4aac139bf]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7fa1010f4210]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x190f44) [0x7fa10123ef44]: 
/usr/games/crawl-git-008097b4cb(_ZNKSt8_Rb_treeINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESt4pairIKS5_15CrawlStoreValueESt10_Select1stIS9_ESt4lessIS5_ESaIS9_EE4findERS7_+0x68) [0x55b4ab1f9678]: std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, CrawlStoreValue>, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, CrawlStoreValue> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, CrawlStoreValue> > >::find(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const
/usr/games/crawl-git-008097b4cb(_ZNK14CrawlHashTable6existsERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x11) [0x55b4ab1f7281]: CrawlHashTable::exists(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const
/usr/games/crawl-git-008097b4cb(_Z14item_base_nameB5cxx11RK8item_def+0x59) [0x55b4aae44529]: item_base_name[abi:cxx11](item_def const&)
/usr/games/crawl-git-008097b4cb(_ZNK8item_def8name_auxB5cxx11E22description_level_typebbb+0x1a09) [0x55b4aae3a419]: item_def::name_aux[abi:cxx11](description_level_type, bool, bool, bool) const
/usr/games/crawl-git-008097b4cb(_ZNK8item_def4nameB5cxx11E22description_level_typebbbb+0x1f4) [0x55b4aae3bbd4]: item_def::name[abi:cxx11](description_level_type, bool, bool, bool, bool) const
/usr/games/crawl-git-008097b4cb(_Z13do_crash_dumpv+0x152a) [0x55b4aac1eb4a]: do_crash_dump()
/usr/games/crawl-git-008097b4cb(_Z20crash_signal_handleri+0x1fa) [0x55b4aac13a2a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7fa1010f4210]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb) [0x7fa1010f418b]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0x12b) [0x7fa1010d3859]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x903ee) [0x7fa10113e3ee]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x9847c) [0x7fa10114647c]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x99cac) [0x7fa101147cac]: 
/usr/games/crawl-git-008097b4cb(_ZN14TilesFramework10_send_cellERK9coord_defRK13screen_cell_tS5_RK8map_cellS8_RSt3mapIjS0_St4lessIjESaISt4pairIKjS0_EEEb+0x123c) [0x55b4ab326e9c]: TilesFramework::_send_cell(coord_def const&, screen_cell_t const&, screen_cell_t const&, map_cell const&, map_cell const&, std::map<unsigned int, coord_def, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, coord_def> > >&, bool)
/usr/games/crawl-git-008097b4cb(_ZN14TilesFramework9_send_mapEb+0x6cf) [0x55b4ab3279bf]: TilesFramework::_send_map(bool)
/usr/games/crawl-git-008097b4cb(_ZN14TilesFramework6redrawEv+0x123) [0x55b4ab328ee3]: TilesFramework::redraw()
/usr/games/crawl-git-008097b4cb(+0xbdb0ba) [0x55b4ab3350ba]: 
/usr/games/crawl-git-008097b4cb(main+0x1ab) [0x55b4aab5a8fb]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7fa1010d50b3]: 
/usr/games/crawl-git-008097b4cb(_start+0x2e) [0x55b4aab5b4ce]: