add a test.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@15543 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/bootstraptest/test_knownbug.rb b/bootstraptest/test_knownbug.rb
index 2c60ac4d9..62c0de57f 100644
--- a/bootstraptest/test_knownbug.rb
+++ b/bootstraptest/test_knownbug.rb
@@ -53,9 +53,15 @@ assert_normal_exit %q{
 assert_normal_exit %q{
   "abc".gsub(/./, "a" => "z")
 }
+
 assert_normal_exit %q{
   Encoding.compatible?("",0)
 }
+
 assert_normal_exit %q{
   "".center(1, "\x80".force_encoding("utf-8"))
 }, '[ruby-dev:33807]'
+
+assert_normal_exit %q{
+  ARGF.set_encoding "foo"
+}