worker_analysis in image_optim-0.26.2

- old
+ new

@@ -165,10 +165,10 @@
         "#{bin.name} #{bin.version}"
       end
     end
 
     def source_digest
-      @digest ||= begin
+      @source_digest ||= begin
         source_path = __getobj__.method(:optimize).source_location[0]
         Digest::SHA256.file(source_path).hexdigest
       end
     end
 