2 files changed, 6 insertions, 1 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 63cb7a23da4..c23585bdab7 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,7 @@
+2012-04-13  Ken Brown  <kbrown@cornell.edu>
+
+        * s/cygwin.h (PTY_OPEN): Don't try to close a bogus file descriptor.
+
 2012-04-13  Reuben Thomas  <rrt@sc3d.org>
 
         * indent.c (Fmove_to_column): Change interactive spec (Bug#739).
diff --git a/src/s/cygwin.h b/src/s/cygwin.h
index 70d64a50c4e..f8c656e8ebc 100644
--- a/src/s/cygwin.h
+++ b/src/s/cygwin.h
@@ -58,7 +58,8 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
       if (-1 == openpty (&fd, &dummy, pty_name, 0, 0))  \
         fd = -1;                                        \
       sigsetmask (mask);                                \
-      emacs_close (dummy);                              \
+      if (fd >= 0)                                      \
+        emacs_close (dummy);                            \
     }                                                   \
   while (0)