Add FrozenError as a subclass of RuntimeError

FrozenError will be used instead of RuntimeError for exceptions
raised when there is an attempt to modify a frozen object. The
reason for this change is to differentiate exceptions related
to frozen objects from generic exceptions such as those generated
by Kernel#raise without an exception class.

From: Jeremy Evans <code@jeremyevans.net>
Signed-off-by: Urabe Shyouhei <shyouhei@ruby-lang.org>


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61131 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 2 deletions

diff --git a/test/ruby/test_class.rb b/test/ruby/test_class.rb
index bb8a3c574d..ad2caeb8be 100644
--- a/test/ruby/test_class.rb
+++ b/test/ruby/test_class.rb
@@ -443,14 +443,14 @@ class TestClass < Test::Unit::TestCase
     obj = Object.new
     c = obj.singleton_class
     obj.freeze
-    assert_raise_with_message(RuntimeError, /frozen object/) {
+    assert_raise_with_message(FrozenError, /frozen object/) {
       c.class_eval {def f; end}
     }
   end
 
   def test_singleton_class_message
     c = Class.new.freeze
-    assert_raise_with_message(RuntimeError, /frozen Class/) {
+    assert_raise_with_message(FrozenError, /frozen Class/) {
       def c.f; end
     }
   end