lib/rubocop/cop/lint/ambiguous_operator.rb in rubocop-0.83.0 vs lib/rubocop/cop/lint/ambiguous_operator.rb in rubocop-0.84.0

@@ -58,11 +58,13 @@
             offense_node = offense_node(node)
             return offense_node if offense_node
           end
 
           ast.each_node(:send).find do |send_node|
-            offense_position?(send_node.first_argument, diagnostic) &&
-              unary_operator?(send_node.first_argument, diagnostic)
+            first_argument = send_node.first_argument
+
+            first_argument &&
+              offense_position?(first_argument, diagnostic) && unary_operator?(first_argument, diagnostic)
           end
         end
 
         def alternative_message(diagnostic)
           operator = diagnostic.location.source