- fixed issues with uninitialized RNGs and bad assumptions about corpse pointers always being fully initialized when being destroyed.

Both of these may be true when occuring during normal gameplay, but not during an exception unwind in the serializer, which caused crashes if ACS errored out due to mismatched scripts.

src/g_shared/a_action.cpp

@@ -142,21 +142,25 @@ void DCorpsePointer::OnDestroy ()
 	TThinkerIterator<DCorpsePointer> iterator (STAT_CORPSEPOINTER);
 	DCorpsePointer *first = iterator.Next ();
 
-	int prevCount = first->Count;
-
-	if (first == this)
+	// During a serialization unwind the thinker list won't be available.
+	if (first != nullptr)
 	{
-		first = iterator.Next ();
-	}
+		int prevCount = first->Count;
 
-	if (first != NULL)
-	{
-		first->Count = prevCount - 1;
-	}
+		if (first == this)
+		{
+			first = iterator.Next();
+		}
 
+		if (first != NULL)
+		{
+			first->Count = prevCount - 1;
+		}
+
+	}
 	if (Corpse != NULL)
 	{
-		Corpse->Destroy ();
+		Corpse->Destroy();
 	}
 	Super::OnDestroy();
 }

src/m_random.cpp

@@ -156,6 +156,7 @@ FRandom::FRandom ()
 #endif
 	Next = RNGList;
 	RNGList = this;
+	Init(0);
 }
 
 //==========================================================================
@@ -199,6 +200,7 @@ FRandom::FRandom (const char *name)
 
 	Next = probe;
 	*prev = this;
+	Init(0);
 }
 
 //==========================================================================