From ad17ba0e11cd3b3c6031efe9e7710a9310ff0304 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Mon, 25 Dec 2017 23:52:40 +0900
Subject: `KeyError` from `Hash#fetch` should inspect key.

To distinguish string keys and symbol keys.
---
 mrbgems/mruby-hash-ext/mrblib/hash.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mrbgems/mruby-hash-ext/mrblib/hash.rb b/mrbgems/mruby-hash-ext/mrblib/hash.rb
index d1a709325..549bca0a8 100644
--- a/mrbgems/mruby-hash-ext/mrblib/hash.rb
+++ b/mrbgems/mruby-hash-ext/mrblib/hash.rb
@@ -165,7 +165,7 @@ class Hash
       elsif none != NONE
         none
       else
-        raise KeyError, "Key not found: #{key}"
+        raise KeyError, "Key not found: #{key.inspect}"
       end
     else
       self[key]
-- 
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