surviving petrification (trunk only)

From the newsgroup:  if you were wielding a cockatrice corpse without
gloves while polymorphed into something capable of doing that, then were
turned to stone when rehumanizing, you'd be left wielding the untouchable
corpse if life-saving kept the game going.  This causes it to stop being
wielded if you get that far.  Likewise for monsters.

src/mhitm.c

@@ -1130,8 +1130,7 @@ mdamagem(magr, mdef, mattk)
 			obj_extract_self(otmp);
 			if (otmp->owornmask) {
 				mdef->misc_worn_check &= ~otmp->owornmask;
-				if (otmp->owornmask & W_WEP)
-				    setmnotwielded(mdef,otmp);
+				if (otmp->owornmask & W_WEP) mwepgone(mdef);
 				otmp->owornmask = 0L;
 				update_mon_intrinsics(mdef, otmp, FALSE, FALSE);
 			}

src/trap.c

@@ -2448,14 +2448,19 @@ const char *arg;
 		        mons[uwep->corpsenm].mname);
 		Sprintf(kbuf, "%s corpse", an(mons[uwep->corpsenm].mname));
 		instapetrify(kbuf);
+		/* life-saved; unwield the corpse if we can't handle it */
+		if (!uarmg && !Stone_resistance) uwepgone();
 	}
-	/* Or your secondary weapon, if wielded */
+	/* Or your secondary weapon, if wielded [hypothetical; we don't
+	   allow two-weapon combat when either weapon is a corpse] */
 	if(u.twoweap && uswapwep && uswapwep->otyp == CORPSE &&
 			touch_petrifies(&mons[uswapwep->corpsenm]) && !Stone_resistance){
 		pline("%s touch the %s corpse.", arg,
 		        mons[uswapwep->corpsenm].mname);
 		Sprintf(kbuf, "%s corpse", an(mons[uswapwep->corpsenm].mname));
 		instapetrify(kbuf);
+		/* life-saved; unwield the corpse */
+		if (!uarmg && !Stone_resistance) uswapwepgone();
 	}
 }
 
@@ -2467,13 +2472,19 @@ boolean byplayer;
 {
 	struct obj *mwep = MON_WEP(mon);
 
-	if (mwep && mwep->otyp == CORPSE && touch_petrifies(&mons[mwep->corpsenm])) {
+	if (mwep && mwep->otyp == CORPSE &&
+		    touch_petrifies(&mons[mwep->corpsenm]) &&
+		    !resists_ston(mon)) {
 		if (cansee(mon->mx, mon->my)) {
-			pline("%s%s touches the %s corpse.",
+			pline("%s%s touches %s.",
 			    arg ? arg : "", arg ? mon_nam(mon) : Monnam(mon),
-			    mons[mwep->corpsenm].mname);
+			    corpse_xname(mwep, (const char *)0, CXN_PFX_THE));
 		}
 		minstapetrify(mon, byplayer);
+		/* if life-saved, might not be able to continue wielding */
+		if (mon->mhp > 0 && !which_armor(mon, W_ARMG) &&
+			!resists_ston(mon))
+		    mwepgone(mon);
 	}
 }
 

src/weapon.c

@@ -706,6 +706,20 @@ register struct monst *mon;
 	return 0;
 }
 
+/* force monster to stop wielding current weapon, if any */
+void
+mwepgone(mon)
+struct monst *mon;
+{
+    struct obj *mwep = MON_WEP(mon);
+
+    if (mwep) {
+	setmnotwielded(mon, mwep);
+	MON_NOWEP(mon);
+	mon->weapon_check = NEED_WEAPON;
+    }
+}
+
 int
 abon()		/* attack bonus for strength & dexterity */
 {