* re.c (match_setter): it's OK to assign nil to $~.

* io.c (rb_io_fptr_cleanup): do not close IO created by for_fd().

* io.c (rb_io_initialize): mark IO created by for_fd

* ext/socket/socket.c (bsock_s_for_fd): ditto.


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@2312 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 1 deletions

diff --git a/re.c b/re.c
index 67ee4dfc1..b7603e0f2 100644
--- a/re.c
+++ b/re.c
@@ -1392,7 +1392,9 @@ static void
 match_setter(val)
     VALUE val;
 {
-    Check_Type(val, T_MATCH);
+    if (!NIL_P(val)) {
+	Check_Type(val, T_MATCH);
+    }
     rb_backref_set(val);
 }