diff -r ad1cc596bedb Lib/subprocess.py
--- a/Lib/subprocess.py	Wed Oct 24 23:43:02 2012 +0300
+++ b/Lib/subprocess.py	Thu Oct 25 15:25:20 2012 -0700
@@ -671,12 +671,20 @@
          c2pread, c2pwrite,
          errread, errwrite) = self._get_handles(stdin, stdout, stderr)
 
-        self._execute_child(args, executable, preexec_fn, close_fds,
-                            cwd, env, universal_newlines,
-                            startupinfo, creationflags, shell,
-                            p2cread, p2cwrite,
-                            c2pread, c2pwrite,
-                            errread, errwrite)
+        try:
+            self._execute_child(args, executable, preexec_fn, close_fds,
+                                cwd, env, universal_newlines,
+                                startupinfo, creationflags, shell,
+                                p2cread, p2cwrite,
+                                c2pread, c2pwrite,
+                                errread, errwrite)
+        except OSError:
+            for handle in (p2cread, p2cwrite,
+                           c2pread, c2pwrite,
+                           errread, errwrite):
+                if handle is not None:
+                    os.close(handle)
+            raise
 
         if mswindows:
             if p2cwrite is not None: