Report classified this as 'segfault' but it's actually a controlled
panic(). When hero has lycanthropy and is wielding a potion of unholy
water while in human form, if that potion is boiled then it triggers
a transformation to beast form which in turn causes wielded weapon to
be dropped. When the code unwinds back up through potionbreathe() to
destroy_item(), the boiled potion won't be found in inventory any more
and useup() -> useupall() -> freeinv() -> extract_nobj() panics.
152d9e7705