lib/graphql/analysis/ast/field_usage.rb in graphql-1.12.22 vs lib/graphql/analysis/ast/field_usage.rb in graphql-1.12.23

@@ -13,11 +13,15 @@
         def on_leave_field(node, parent, visitor)
           field_defn = visitor.field_definition
           field = "#{visitor.parent_type_definition.graphql_name}.#{field_defn.graphql_name}"
           @used_fields << field
           @used_deprecated_fields << field if field_defn.deprecation_reason
-
-          extract_deprecated_arguments(visitor.query.arguments_for(node, visitor.field_definition).argument_values)
+          arguments = visitor.query.arguments_for(node, visitor.field_definition)
+          # If there was an error when preparing this argument object,
+          # then this might be an error or something:
+          if arguments.respond_to?(:argument_values)
+            extract_deprecated_arguments(arguments.argument_values)
+          end
         end
 
         def result
           {
             used_fields: @used_fields.to_a,