diff --git a/lib/mutant/reporter/cli.rb b/lib/mutant/reporter/cli.rb
index ca4e7076..4f9ec6e1 100644
--- a/lib/mutant/reporter/cli.rb
+++ b/lib/mutant/reporter/cli.rb
@@ -221,8 +221,6 @@ module Mutant
         diff = color? ? differ.colorized_diff : differ.diff
         # FIXME remove this branch before release
         if diff.empty?
-          killer.send(:mutation).node.ascii_graph
-          killer.send(:mutation).subject.node.ascii_graph
           raise "Unable to create a diff, so ast mutation or to_source has an error!"
         end
         puts(diff)