GDScript: Give an error if dependency can't be parsed

Otherwise this may lead to a crash when the dependency is not present.

modules/gdscript/gdscript_analyzer.cpp

@@ -2029,9 +2029,17 @@ void GDScriptAnalyzer::reduce_get_node(GDScriptParser::GetNodeNode *p_get_node)
 	p_get_node->set_datatype(result);
 }
 
-GDScriptParser::DataType GDScriptAnalyzer::make_global_class_meta_type(const StringName &p_class_name) {
+GDScriptParser::DataType GDScriptAnalyzer::make_global_class_meta_type(const StringName &p_class_name, const GDScriptParser::Node *p_source) {
 	Ref<GDScriptParserRef> ref = get_parser_for(ScriptServer::get_global_class_path(p_class_name));
-	ref->raise_status(GDScriptParserRef::INTERFACE_SOLVED);
+	Error err = ref->raise_status(GDScriptParserRef::INTERFACE_SOLVED);
+
+	if (err) {
+		push_error(vformat(R"(Could not resolve class "%s", because of a parser error.)", p_class_name), p_source);
+		GDScriptParser::DataType type;
+		type.type_source = GDScriptParser::DataType::UNDETECTED;
+		type.kind = GDScriptParser::DataType::VARIANT;
+		return type;
+	}
 
 	GDScriptParser::DataType type;
 	type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
@@ -2303,7 +2311,7 @@ void GDScriptAnalyzer::reduce_identifier(GDScriptParser::IdentifierNode *p_ident
 	}
 
 	if (ScriptServer::is_global_class(name)) {
-		p_identifier->set_datatype(make_global_class_meta_type(name));
+		p_identifier->set_datatype(make_global_class_meta_type(name, p_identifier));
 		return;
 	}
 

modules/gdscript/gdscript_analyzer.h

@@ -96,7 +96,7 @@ class GDScriptAnalyzer {
 	GDScriptParser::DataType type_from_variant(const Variant &p_value, const GDScriptParser::Node *p_source);
 	GDScriptParser::DataType type_from_metatype(const GDScriptParser::DataType &p_meta_type) const;
 	GDScriptParser::DataType type_from_property(const PropertyInfo &p_property) const;
-	GDScriptParser::DataType make_global_class_meta_type(const StringName &p_class_name);
+	GDScriptParser::DataType make_global_class_meta_type(const StringName &p_class_name, const GDScriptParser::Node *p_source);
 	bool get_function_signature(GDScriptParser::Node *p_source, GDScriptParser::DataType base_type, const StringName &p_function, GDScriptParser::DataType &r_return_type, List<GDScriptParser::DataType> &r_par_types, int &r_default_arg_count, bool &r_static, bool &r_vararg);
 	bool function_signature_from_info(const MethodInfo &p_info, GDScriptParser::DataType &r_return_type, List<GDScriptParser::DataType> &r_par_types, int &r_default_arg_count, bool &r_static, bool &r_vararg);
 	bool validate_call_arg(const List<GDScriptParser::DataType> &p_par_types, int p_default_args_count, bool p_is_vararg, const GDScriptParser::CallNode *p_call);