Don't use Enumerator#count for lazy enums.

This causes methods such as Enumerable#enumerator_size to go into a (near) infinite loop depending on the size of the lazy enumerator.
rubinius · Feb 17, 2015 · 07a4c4b · 07a4c4b
1 parent 76a23a6
commit 07a4c4b
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/kernel/common/enumerator.rb b/kernel/common/enumerator.rb
@@ -152,7 +152,9 @@ def size
         @size.call
       elsif @size
         @size
-      else
+      # Lazy enums don't have a size and in case of Rbx can go into an infinite
+      # loop when using "count".
+      elsif !kind_of?(Enumerator::Lazy)
         count
       end
     end