Obtained 21 stack frames.
/usr/games/crawl-bcadren(_Z17write_stack_traceP8_IO_FILE+0x3b) [0x55bbd34f606b]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-bcadren(_Z20crash_signal_handleri+0x1e5) [0x55bbd34f6515]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3ef20) [0x7f7ca2571f20]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xc7) [0x7f7ca2936727]: 
/usr/games/crawl-bcadren(+0x39165b) [0x55bbd34fe65b]: 
/usr/games/crawl-bcadren(+0x391b68) [0x55bbd34feb68]: 
/usr/games/crawl-bcadren(_Z20crash_signal_handleri+0x299) [0x55bbd34f65c9]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3ef20) [0x7f7ca2571f20]: 
/usr/games/crawl-bcadren(_ZN3rng6PcgRNG18get_bounded_uint32Ej+0x3a) [0x55bbd38e908a]: rng::PcgRNG::get_bounded_uint32(unsigned int)
/usr/games/crawl-bcadren(+0x418a3a) [0x55bbd3585a3a]: 
/usr/games/crawl-bcadren(+0x41e96b) [0x55bbd358b96b]: 
/usr/games/crawl-bcadren(+0x41ece4) [0x55bbd358bce4]: 
/usr/games/crawl-bcadren(_Z7builderb+0x1235) [0x55bbd35a19c5]: builder(bool)
/usr/games/crawl-bcadren(_Z14generate_levelRK8level_id+0xf38) [0x55bbd35d9bb8]: generate_level(level_id const&)
/usr/games/crawl-bcadren(_Z14pregen_dungeonRK8level_id+0x545) [0x55bbd35daa25]: pregen_dungeon(level_id const&)
/usr/games/crawl-bcadren(_Z10load_level20dungeon_feature_type14load_mode_typeRK8level_id+0x3f8) [0x55bbd35daff8]: load_level(dungeon_feature_type, load_mode_type, level_id const&)
/usr/games/crawl-bcadren(_Z12startup_stepv+0x162f) [0x55bbd39f561f]: startup_step()
/usr/games/crawl-bcadren(+0x9a8f99) [0x55bbd3b15f99]: 
/usr/games/crawl-bcadren(main+0x323) [0x55bbd3444b73]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7f7ca2554b97]: 
/usr/games/crawl-bcadren(_start+0x2a) [0x55bbd344527a]: