* encoding.c (rb_enc_compatible): fix segv on symbols.

  [ruby-core:42204] [Bug #5921]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34350 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/test/ruby/test_encoding.rb b/test/ruby/test_encoding.rb
index 6cb13fda9c..de96ebd17d 100644
--- a/test/ruby/test_encoding.rb
+++ b/test/ruby/test_encoding.rb
@@ -104,4 +104,10 @@ class TestEncoding < Test::Unit::TestCase
     bug5279 = '[ruby-dev:44469]'
     assert_ruby_status([], '$SAFE=4; "a".encode("utf-16be")', bug5279)
   end
+
+  def test_compatible_p
+    ua = "abc".force_encoding(Encoding::UTF_8)
+    assert_equal(Encoding::UTF_8, Encoding.compatible?(ua, :abc))
+    assert_equal(nil, Encoding.compatible?(ua, 1))
+  end
 end