Report was for dual-wielding hitting an enchanter and assumed that
a resistant artifact as primary weapon was protecting vulnerable
secondary weapon. Actual reason was simpler.
When in normal form, dual-wielding attacks against creatures which
cause erosion to the weapon which hits them would only inflict the
passive erosion damage to the primary weapon, even if it missed and
secondary hit. Make primary attack always trigger passive counter-
attack--before second swing now, rather than after--even if it misses,
and secondary attack trigger another one if that hits. Both weapons
are now subject to passive erosion (but only when they actually hit);
when secondary weapon hits, hero gets a double dose of counter-attack.
Hero poly'd into a monster with multiple weapon attacks (various
leaders: dwarf lord, orc-captain, and so forth) would try to emulate
dual wielding and first hit with uwep then with uswapwep. But it
would do that even if uswapwep was a bow or stack of darts that the
player had no itention of using for hand-to-hand. Stick with repeat
hits by uwep when uswapwep seems inappropriate.
Splitting a pudding while dual-wielding would only do so when hit by
uwep of appropriate material, never when hit by uswapwep. So silver
saber and longsword could split if longsword was primary but never
split if saber was primary. Check material and splitting separately
for each hit. It's now possible to split twice with one dual-weapon
attack if both weapons hit and both are made of the right material
(iron or 'metal'; among relevant objects the latter is only used for
tsurugi and scapel).
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