GDScript: Don't use pool for reference types

Since they need to be properly initialized and finalized to adjust the
reference counter.

modules/gdscript/gdscript_byte_codegen.cpp

@@ -69,56 +69,52 @@ uint32_t GDScriptByteCodeGenerator::add_or_get_name(const StringName &p_name) {
 
 uint32_t GDScriptByteCodeGenerator::add_temporary(const GDScriptDataType &p_type) {
 	Variant::Type temp_type = Variant::NIL;
-	if (p_type.has_type) {
-		if (p_type.kind == GDScriptDataType::BUILTIN) {
-			switch (p_type.builtin_type) {
-				case Variant::NIL:
-				case Variant::BOOL:
-				case Variant::INT:
-				case Variant::FLOAT:
-				case Variant::STRING:
-				case Variant::VECTOR2:
-				case Variant::VECTOR2I:
-				case Variant::RECT2:
-				case Variant::RECT2I:
-				case Variant::VECTOR3:
-				case Variant::VECTOR3I:
-				case Variant::TRANSFORM2D:
-				case Variant::VECTOR4:
-				case Variant::VECTOR4I:
-				case Variant::PLANE:
-				case Variant::QUATERNION:
-				case Variant::AABB:
-				case Variant::BASIS:
-				case Variant::TRANSFORM3D:
-				case Variant::PROJECTION:
-				case Variant::COLOR:
-				case Variant::STRING_NAME:
-				case Variant::NODE_PATH:
-				case Variant::RID:
-				case Variant::OBJECT:
-				case Variant::CALLABLE:
-				case Variant::SIGNAL:
-				case Variant::DICTIONARY:
-				case Variant::ARRAY:
-					temp_type = p_type.builtin_type;
-					break;
-				case Variant::PACKED_BYTE_ARRAY:
-				case Variant::PACKED_INT32_ARRAY:
-				case Variant::PACKED_INT64_ARRAY:
-				case Variant::PACKED_FLOAT32_ARRAY:
-				case Variant::PACKED_FLOAT64_ARRAY:
-				case Variant::PACKED_STRING_ARRAY:
-				case Variant::PACKED_VECTOR2_ARRAY:
-				case Variant::PACKED_VECTOR3_ARRAY:
-				case Variant::PACKED_COLOR_ARRAY:
-				case Variant::VARIANT_MAX:
-					// Packed arrays are reference counted, so we don't use the pool for them.
-					temp_type = Variant::NIL;
-					break;
-			}
-		} else {
-			temp_type = Variant::OBJECT;
+	if (p_type.has_type && p_type.kind == GDScriptDataType::BUILTIN) {
+		switch (p_type.builtin_type) {
+			case Variant::NIL:
+			case Variant::BOOL:
+			case Variant::INT:
+			case Variant::FLOAT:
+			case Variant::STRING:
+			case Variant::VECTOR2:
+			case Variant::VECTOR2I:
+			case Variant::RECT2:
+			case Variant::RECT2I:
+			case Variant::VECTOR3:
+			case Variant::VECTOR3I:
+			case Variant::TRANSFORM2D:
+			case Variant::VECTOR4:
+			case Variant::VECTOR4I:
+			case Variant::PLANE:
+			case Variant::QUATERNION:
+			case Variant::AABB:
+			case Variant::BASIS:
+			case Variant::TRANSFORM3D:
+			case Variant::PROJECTION:
+			case Variant::COLOR:
+			case Variant::STRING_NAME:
+			case Variant::NODE_PATH:
+			case Variant::RID:
+			case Variant::CALLABLE:
+			case Variant::SIGNAL:
+				temp_type = p_type.builtin_type;
+				break;
+			case Variant::OBJECT:
+			case Variant::DICTIONARY:
+			case Variant::ARRAY:
+			case Variant::PACKED_BYTE_ARRAY:
+			case Variant::PACKED_INT32_ARRAY:
+			case Variant::PACKED_INT64_ARRAY:
+			case Variant::PACKED_FLOAT32_ARRAY:
+			case Variant::PACKED_FLOAT64_ARRAY:
+			case Variant::PACKED_STRING_ARRAY:
+			case Variant::PACKED_VECTOR2_ARRAY:
+			case Variant::PACKED_VECTOR3_ARRAY:
+			case Variant::PACKED_COLOR_ARRAY:
+			case Variant::VARIANT_MAX:
+				// Arrays, dictionaries, and objects are reference counted, so we don't use the pool for them.
+				temp_type = Variant::NIL;
+				break;
 		}
 	}
 
@@ -143,7 +139,7 @@ void GDScriptByteCodeGenerator::pop_temporary() {
 	ERR_FAIL_COND(used_temporaries.is_empty());
 	int slot_idx = used_temporaries.back()->get();
 	const StackSlot &slot = temporaries[slot_idx];
-	if (slot.type == Variant::OBJECT) {
+	if (slot.type == Variant::NIL) {
 		// Avoid keeping in the stack long-lived references to objects,
 		// which may prevent RefCounted objects from being freed.
 		write_assign_false(Address(Address::TEMPORARY, slot_idx));