Fix String#rpartition(/re/) against a multibyte string.

* string.c (rb_str_rpartition): Fix String#rpartition(/re/)
  against a multibyte string. [Bug #8138] [ruby-dev:47183]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39903 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 0 deletions

diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index a0fb80f46e..4d9f7d95b0 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -1998,6 +1998,9 @@ class TestString < Test::Unit::TestCase
       s = S("a:".force_encoding(enc))
       assert_equal([enc]*3, s.partition("|").map(&:encoding), bug6206)
     end
+
+    assert_equal(["\u30E6\u30FC\u30B6", "@", "\u30C9\u30E1.\u30A4\u30F3"],
+      "\u30E6\u30FC\u30B6@\u30C9\u30E1.\u30A4\u30F3".partition(/[@.]/))
   end
 
   def test_rpartition
@@ -2013,6 +2016,10 @@ class TestString < Test::Unit::TestCase
       s = S("a:".force_encoding(enc))
       assert_equal([enc]*3, s.rpartition("|").map(&:encoding), bug6206)
     end
+
+    bug8138 = '[ruby-dev:47183]'
+    assert_equal(["\u30E6\u30FC\u30B6@\u30C9\u30E1", ".", "\u30A4\u30F3"],
+      "\u30E6\u30FC\u30B6@\u30C9\u30E1.\u30A4\u30F3".rpartition(/[@.]/), bug8138)
   end
 
   def test_setter