Obtained 21 stack frames.
/usr/games/crawl-bcadren(_Z17write_stack_traceP8_IO_FILE+0x3b) [0x5587bf51906b]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-bcadren(_Z20crash_signal_handleri+0x1e5) [0x5587bf519515]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3ef20) [0x7f7d0e775f20]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xc7) [0x7f7d0eb3a727]: 
/usr/games/crawl-bcadren(+0x39165b) [0x5587bf52165b]: 
/usr/games/crawl-bcadren(+0x391b68) [0x5587bf521b68]: 
/usr/games/crawl-bcadren(_Z20crash_signal_handleri+0x299) [0x5587bf5195c9]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3ef20) [0x7f7d0e775f20]: 
/usr/games/crawl-bcadren(_ZN3rng6PcgRNG18get_bounded_uint32Ej+0xaf) [0x5587bf90c0ff]: rng::PcgRNG::get_bounded_uint32(unsigned int)
/usr/games/crawl-bcadren(+0x418a3a) [0x5587bf5a8a3a]: 
/usr/games/crawl-bcadren(+0x41e96b) [0x5587bf5ae96b]: 
/usr/games/crawl-bcadren(+0x41ece4) [0x5587bf5aece4]: 
/usr/games/crawl-bcadren(_Z7builderb+0x1235) [0x5587bf5c49c5]: builder(bool)
/usr/games/crawl-bcadren(_Z14generate_levelRK8level_id+0xf38) [0x5587bf5fcbb8]: generate_level(level_id const&)
/usr/games/crawl-bcadren(_Z14pregen_dungeonRK8level_id+0x545) [0x5587bf5fda25]: pregen_dungeon(level_id const&)
/usr/games/crawl-bcadren(_Z10load_level20dungeon_feature_type14load_mode_typeRK8level_id+0x3f8) [0x5587bf5fdff8]: load_level(dungeon_feature_type, load_mode_type, level_id const&)
/usr/games/crawl-bcadren(_Z12startup_stepv+0x162f) [0x5587bfa1861f]: startup_step()
/usr/games/crawl-bcadren(+0x9a8f99) [0x5587bfb38f99]: 
/usr/games/crawl-bcadren(main+0x323) [0x5587bf467b73]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7f7d0e758b97]: 
/usr/games/crawl-bcadren(_start+0x2a) [0x5587bf46827a]: