Obtained 20 stack frames.
/usr/games/crawl-git-6af420d3c9(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x6041f3]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-git-6af420d3c9(_Z20crash_signal_handleri+0x174) [0x604564]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x321e0) [0x7f949300a1e0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0x2b) [0x7f9493372f6b]: 
/usr/games/crawl-git-6af420d3c9() [0x60a9b4]
/usr/games/crawl-git-6af420d3c9() [0x60ae3f]
/usr/games/crawl-git-6af420d3c9(_Z20crash_signal_handleri+0x293) [0x604683]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x321e0) [0x7f949300a1e0]: 
/usr/games/crawl-git-6af420d3c9(_Z18gozag_potion_pricev+0x6) [0x6d2416]: gozag_potion_price()
/usr/games/crawl-git-6af420d3c9(_Z21gozag_potion_petitionv+0x3c3) [0x6dc943]: gozag_potion_petition()
/usr/games/crawl-git-6af420d3c9(_Z13run_uncancelsv+0x7d) [0xa6c96d]: run_uncancels()
/usr/games/crawl-git-6af420d3c9() [0x586755]
/usr/games/crawl-git-6af420d3c9(_Z15activate_talentRK6talent+0x1f1) [0x589781]: activate_talent(talent const&)
/usr/games/crawl-git-6af420d3c9(_Z16activate_abilityv+0x218) [0x589d68]: activate_ability()
/usr/games/crawl-git-6af420d3c9(_Z15process_command12command_type+0xc1a) [0x7d425a]: process_command(command_type)
/usr/games/crawl-git-6af420d3c9() [0x7d67c9]
/usr/games/crawl-git-6af420d3c9() [0x7d714d]
/usr/games/crawl-git-6af420d3c9(main+0x2f9) [0x515fd9]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f9492ff6ead]: 
/usr/games/crawl-git-6af420d3c9() [0x575a31]