I got "The chain mail rusts." seemingly out of the blue, then when
moving around the corner of the building on Valk home level I saw a
spot of remembered ice be redrawn as water. Before that I checked
for any mapped objects (via ';' 'o' 'o' ... so I didn't overlook
anything; there were only a couple of objects shown on the map and
none of them were piles) and didn't see any remembered chail mail or
anything at all on that ice spot, so I'm assuming that it was carried
by a monster. I may be leaving out some steps in the call chain here:
melt_ice -> minliquid -> mondead -> m_detach -> relobj -> mdrop_obj
-> flooreffects -> water_damage -> erode_obj
erode_obj() uses bhitpos for visibility check of eroding objects not
carried by the hero or by a monster, with a comment expressing doubt
about doing that. It wouldn't have yielded the right answer for the
possible call chain here unless it got set by some monster activity.
I had been zapping a wand just before and bhitpos would have been set
to a coordinate I could see at the time, fooling erode_obj()'s check
if the value was stale.
Anyway, this only addresses objects eroded from flooreffects(),
water_damage_chain(), and fire_damage_chain(). There are lots of
other indirect calls to erode_obj().
c6b82c0e4f