- fixed: The struct field compiler did not check for forward declared type references that hadn't been resolved yet.

src/scripting/types.cpp

@@ -2247,6 +2247,7 @@ bool PStruct::ReadValue(FSerializer &ar, const char *key, void *addr) const
 
 PField *PStruct::AddField(FName name, PType *type, uint32_t flags)
 {
+	assert(type->Size > 0);
 	return Symbols.AddField(name, type, flags, Size, &Align);
 }
 

src/scripting/zscript/zcc_compile.cpp

@@ -1298,6 +1298,11 @@ bool ZCCCompiler::CompileFields(PContainerType *type, TArray<ZCC_VarDeclarator *
 		auto name = field->Names;
 		do
 		{
+			if (fieldtype->Size == 0 && !(varflags & VARF_Native))	// Size not known yet.
+			{
+				return false;
+			}
+
 			if (AddTreeNode(name->Name, name, TreeNodes, !forstruct))
 			{
 				auto thisfieldtype = fieldtype;