diff --git a/lib/atomo/patterns/head_tail.rb b/lib/atomo/patterns/head_tail.rb
index <HASH>..<HASH> 100644
--- a/lib/atomo/patterns/head_tail.rb
+++ b/lib/atomo/patterns/head_tail.rb
@@ -22,7 +22,6 @@ module Atomo::Patterns
       matched = g.new_label
 
       g.dup
-      g.dup
       g.send :empty?, 0
       g.git mismatch
correct HeadTail#matches?