* enum.c (rb_enum_join): non-nil separator must be convertible to

  String.  [ruby-core:24172]


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@23979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 15 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index f6728bb5a..6b4396f74 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Jul  7 13:34:30 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* enum.c (rb_enum_join): non-nil separator must be convertible to
+	  String.  [ruby-core:24172]
+
 Tue Jul  7 12:47:28 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* enum.c (rb_enum_join): should propagate taint to the return
diff --git a/enum.c b/enum.c
index bb480ba9e..cab612bbb 100644
--- a/enum.c
+++ b/enum.c
@@ -1828,6 +1828,7 @@ rb_enum_join(VALUE obj, VALUE sep)
 
     args[0] = 0;
     args[1] = sep;
+    if (!NIL_P(sep)) StringValue(args[1]);
     rb_block_call(obj, id_each, 0, 0, join_i, (VALUE)args);
     if (!args[0]) args[0] = rb_str_new(0, 0);
     OBJ_INFECT(args[0], obj);
diff --git a/test/ruby/test_enum.rb b/test/ruby/test_enum.rb
index 6f27c5b82..e0e77b486 100644
--- a/test/ruby/test_enum.rb
+++ b/test/ruby/test_enum.rb
@@ -285,8 +285,15 @@ class TestEnumerable < Test::Unit::TestCase
   end
 
   def test_join
+    ofs = $,
     assert_equal("abc", ("a".."c").join(""))
     assert_equal("a-b-c", ("a".."c").join("-"))
+    $, = "-"
+    assert_equal("a-b-c", ("a".."c").join())
+    $, = nil
+    assert_equal("abc", ("a".."c").join())
+    assert_equal("123", (1..3).join())
+    assert_raise(TypeError, '[ruby-core:24172]') {("a".."c").join(1)}
     class << (e = Object.new.extend(Enumerable))
       def to_s
         "e"
@@ -296,5 +303,7 @@ class TestEnumerable < Test::Unit::TestCase
       end
     end
     assert_equal("e", e.join(""))
+  ensure
+    $, = ofs
   end
 end