lib/object/cache.rb in object-cache-0.0.3 vs lib/object/cache.rb in object-cache-0.0.4

@@ -105,10 +105,10 @@
 
     def build_key_prefix(key_prefix, proc)
       case key_prefix
       when :method_name
         location = caller_locations.find { |l| "#{l.path}#{l.lineno}" == proc.source_location.join }
-        location&.base_label
+        location && location.base_label
       when :class_name
         proc.binding.receiver.class.to_s
       else
         key_prefix
       end