* io.c (rb_io_synchronized): should check if initialized.

  [ruby-dev:32585]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14219 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/io.c b/io.c
index fdea5d2722..f0d314396b 100644
--- a/io.c
+++ b/io.c
@@ -3301,6 +3301,7 @@ pipe_finalize(rb_io_t *fptr, int noraise)
 void
 rb_io_synchronized(rb_io_t *fptr)
 {
+    rb_io_check_initialized(fptr);
     fptr->mode |= FMODE_SYNC;
 }