Obtained 26 stack frames.
/usr/games/crawl-i2-cryptic-rebase(_Z17write_stack_traceP8_IO_FILEi+0x2d) [0xb90fd8]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-i2-cryptic-rebase(_Z20crash_signal_handleri+0x23a) [0xb90d9b]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f8bea8694c0]: 
/usr/games/crawl-i2-cryptic-rebase(_ZNKSt10unique_ptrI15vault_placementSt14default_deleteIS0_EE3getEv+0x18) [0xac601c]: std::unique_ptr<vault_placement, std::default_delete<vault_placement> >::get() const
/usr/games/crawl-i2-cryptic-rebase(_ZNKSt10unique_ptrI15vault_placementSt14default_deleteIS0_EEptEv+0x18) [0xb9fc0a]: std::unique_ptr<vault_placement, std::default_delete<vault_placement> >::operator->() const
/usr/games/crawl-i2-cryptic-rebase(_Z23raw_feature_descriptionRK9coord_def+0x5f) [0xc61cb3]: raw_feature_description(coord_def const&)
/usr/games/crawl-i2-cryptic-rebase() [0xb9906c]
/usr/games/crawl-i2-cryptic-rebase(_Z13do_crash_dumpv+0x5a9) [0xb9b48f]: do_crash_dump()
/usr/games/crawl-i2-cryptic-rebase(_Z20crash_signal_handleri+0x2c1) [0xb90e22]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f8bea8694c0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0x2b) [0x7f8beabffb7b]: 
/usr/games/crawl-i2-cryptic-rebase() [0xb9b879]
/usr/games/crawl-i2-cryptic-rebase(_Z12AssertFailedPKcS0_iS0_z+0x1f4) [0xb9ba72]: AssertFailed(char const*, char const*, int, char const*, ...)
/usr/games/crawl-i2-cryptic-rebase(_ZNK9PlaceInfo15assert_validityEv+0x57) [0x10f049b]: PlaceInfo::assert_validity() const
/usr/games/crawl-i2-cryptic-rebase(_ZN6player14set_place_infoE9PlaceInfo+0x15) [0x1119f6b]: player::set_place_info(PlaceInfo)
/usr/games/crawl-i2-cryptic-rebase() [0x1265579]
/usr/games/crawl-i2-cryptic-rebase(_Z8tag_readR6reader8tag_type+0x1ae) [0x1259e68]: tag_read(reader&, tag_type)
/usr/games/crawl-i2-cryptic-rebase() [0xce576b]
/usr/games/crawl-i2-cryptic-rebase() [0xce3dcd]
/usr/games/crawl-i2-cryptic-rebase(_Z12restore_gameRKSs+0x19) [0xce4973]: restore_game(std::string const&)
/usr/games/crawl-i2-cryptic-rebase(_Z12startup_stepv+0x18d) [0x122e662]: startup_step()
/usr/games/crawl-i2-cryptic-rebase() [0x13db364]
/usr/games/crawl-i2-cryptic-rebase() [0x13db226]
/usr/games/crawl-i2-cryptic-rebase(main+0x172) [0x13db050]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f8bea85476d]: 
/usr/games/crawl-i2-cryptic-rebase() [0xaa1399]