hash.c: key name in error message

* hash.c (env_fetch): Add key name to message on ENV.fetch KeyError,
  as well as Hash#fetch.  [ruby-core:56062] [Feature #8649]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42025 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/hash.c b/hash.c
index 6cddb8cf0b..e170e67660 100644
--- a/hash.c
+++ b/hash.c
@@ -2411,7 +2411,7 @@ env_fetch(int argc, VALUE *argv)
     if (!env) {
 	if (block_given) return rb_yield(key);
 	if (argc == 1) {
-	    rb_raise(rb_eKeyError, "key not found");
+	    rb_raise(rb_eKeyError, "key not found: \"%"PRIsVALUE"\"", key);
 	}
 	return if_none;
     }