"warning: `&' interpreted as argument prefix"

amatsuda · amatsuda · commit 55f72e14ac1c · 2015-09-20T07:06:27.000+09:00
diff --git a/lib/concurrent/synchronization/object.rb b/lib/concurrent/synchronization/object.rb
@@ -122,7 +122,7 @@ def compare_and_set_#{name}(expected, value)
             end
 
             def update_#{name}(&block)
-              #{ivar}.update &block
+              #{ivar}.update(&block)
             end
           RUBY
         end
