* re.c (rb_reg_preprocess): force fixed encoding when ASCII

  incompatible source string.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15260 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/test/ruby/test_utf16.rb b/test/ruby/test_utf16.rb
index 0a4bd4586c..aeb9cea133 100644
--- a/test/ruby/test_utf16.rb
+++ b/test/ruby/test_utf16.rb
@@ -115,4 +115,10 @@ class TestUTF16 < Test::Unit::TestCase
   def test_regexp_union
     enccall(Regexp, :union, "aa".force_encoding("utf-16be"), "bb".force_encoding("utf-16be"))
   end
+
+  def test_empty_regexp
+    s = "".force_encoding("utf-16be")
+    assert_equal(Encoding.find("utf-16be"), Regexp.new(s).encoding,
+                "Regexp.new(#{encdump s}).encoding")
+  end
 end