lib/rubocop/cop/lint/useless_setter_call.rb in rubocop-0.29.0 vs lib/rubocop/cop/lint/useless_setter_call.rb in rubocop-0.29.1

@@ -78,10 +78,10 @@
                 process_logical_operator_assignment(node)
               when :op_asgn
                 process_binary_operator_assignment(node)
               when *ASSIGNMENT_TYPES
                 _, rhs_node = *node
-                process_assignment(node, rhs_node)
+                process_assignment(node, rhs_node) if rhs_node
               end
             end
 
             @local[variable_name]
           end