From 29023ab421e997b4a7f1a4044785aaea6af73ef2 Mon Sep 17 00:00:00 2001
From: Markus Schirp <mbj@schirp-dso.com>
Date: Sun, 6 Jul 2014 03:41:04 +0000
Subject: [PATCH] Deep freeze composed constant

---
 lib/mutant/expression/method.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/mutant/expression/method.rb b/lib/mutant/expression/method.rb
index 900c0d7a..90fb92ee 100644
--- a/lib/mutant/expression/method.rb
+++ b/lib/mutant/expression/method.rb
@@ -4,10 +4,10 @@ module Mutant
     # Explicit method expression
     class Method < self
 
-      MATCHERS = {
+      MATCHERS = IceNine.deep_freeze(
         '.' => Matcher::Methods::Singleton,
         '#' => Matcher::Methods::Instance
-      }.freeze
+      )
 
       register(
         /\A(?<scope_name>#{SCOPE_PATTERN})(?<scope_symbol>[.#])(?<method_name>#{METHOD_NAME_PATTERN})\z/