Obtained 36 stack frames.
/usr/games/crawl-git-2d01d4ab0a(_Z17write_stack_traceP8_IO_FILEi+0x28) [0x55d3441df5b8]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-git-2d01d4ab0a(_Z20crash_signal_handleri+0x1bf) [0x55d3441df9ff]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x33060) [0x7f8ac3d76060]: 
/lib/x86_64-linux-gnu/libc.so.6(sigprocmask+0x10) [0x7f8ac3d762e0]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xe1) [0x7f8ac3d773a1]: 
/usr/games/crawl-git-2d01d4ab0a(+0x342e2b) [0x55d3441e6e2b]: 
/usr/games/crawl-git-2d01d4ab0a(+0x3430bd) [0x55d3441e70bd]: 
/usr/games/crawl-git-2d01d4ab0a(+0x76b3a9) [0x55d34460f3a9]: 
/usr/games/crawl-git-2d01d4ab0a(_Z14spells_in_bookRK8item_def+0x2ca) [0x55d3446103aa]: spells_in_book(item_def const&)
/usr/games/crawl-git-2d01d4ab0a(_Z15is_useless_itemRK8item_defb+0x4c6) [0x55d344391d46]: is_useless_item(item_def const&, bool)
/usr/games/crawl-git-2d01d4ab0a(_Z17is_dangerous_itemRK8item_defb+0x2e) [0x55d3443924ee]: is_dangerous_item(item_def const&, bool)
/usr/games/crawl-git-2d01d4ab0a(_Z11item_prefixB5cxx11RK8item_defb+0x163) [0x55d344392703]: item_prefix[abi:cxx11](item_def const&, bool)
/usr/games/crawl-git-2d01d4ab0a(+0x7562e8) [0x55d3445fa2e8]: 
/usr/games/crawl-git-2d01d4ab0a(_Z14get_cell_glyphRK9coord_defbi+0x359) [0x55d3445fb309]: get_cell_glyph(coord_def const&, bool, int)
/usr/games/crawl-git-2d01d4ab0a(_Z10screenshotB5cxx11v+0x178) [0x55d344704d78]: screenshot[abi:cxx11]()
/usr/games/crawl-git-2d01d4ab0a(_Z13do_crash_dumpv+0x2364) [0x55d3441e9554]: do_crash_dump()
/usr/games/crawl-git-2d01d4ab0a(_Z20crash_signal_handleri+0x7e) [0x55d3441df8be]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x33060) [0x7f8ac3d76060]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xcf) [0x7f8ac40f2f9f]: 
/usr/games/crawl-git-2d01d4ab0a(+0x342e26) [0x55d3441e6e26]: 
/usr/games/crawl-git-2d01d4ab0a(+0x3430bd) [0x55d3441e70bd]: 
/usr/games/crawl-git-2d01d4ab0a(+0x76b3a9) [0x55d34460f3a9]: 
/usr/games/crawl-git-2d01d4ab0a(_Z14spells_in_bookRK8item_def+0x2ca) [0x55d3446103aa]: spells_in_book(item_def const&)
/usr/games/crawl-git-2d01d4ab0a(_Z15is_useless_itemRK8item_defb+0x4c6) [0x55d344391d46]: is_useless_item(item_def const&, bool)
/usr/games/crawl-git-2d01d4ab0a(_Z17is_dangerous_itemRK8item_defb+0x2e) [0x55d3443924ee]: is_dangerous_item(item_def const&, bool)
/usr/games/crawl-git-2d01d4ab0a(_Z11item_prefixB5cxx11RK8item_defb+0x163) [0x55d344392703]: item_prefix[abi:cxx11](item_def const&, bool)
/usr/games/crawl-git-2d01d4ab0a(_Z21item_needs_autopickupRK8item_defb+0x124) [0x55d34439f2a4]: item_needs_autopickup(item_def const&, bool)
/usr/games/crawl-git-2d01d4ab0a(_Z18tile_draw_map_cellRK9coord_defb+0x777) [0x55d34475b937]: tile_draw_map_cell(coord_def const&, bool)
/usr/games/crawl-git-2d01d4ab0a(_Z8tag_readR6reader8tag_type+0x3091) [0x55d3446aaa21]: tag_read(reader&, tag_type)
/usr/games/crawl-git-2d01d4ab0a(+0x405d33) [0x55d3442a9d33]: 
/usr/games/crawl-git-2d01d4ab0a(_Z10load_level20dungeon_feature_type14load_mode_typeRK8level_id+0x1740) [0x55d3442b5b60]: load_level(dungeon_feature_type, load_mode_type, level_id const&)
/usr/games/crawl-git-2d01d4ab0a(_Z12startup_stepv+0x1509) [0x55d34466f009]: startup_step()
/usr/games/crawl-git-2d01d4ab0a(+0x8d63c4) [0x55d34477a3c4]: 
/usr/games/crawl-git-2d01d4ab0a(main+0x13b) [0x55d34414109b]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1) [0x7f8ac3d632e1]: 
/usr/games/crawl-git-2d01d4ab0a(_start+0x2a) [0x55d344141bda]: