Merged revisions 85982 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r85982 | antoine.pitrou | 2010-10-30 18:19:14 +0200 (sam., 30 oct. 2010) | 4 lines

  Issue #10253: FileIO leaks a file descriptor when trying to open a file
  for append that isn't seekable.  Patch by Brian Brazil.
........
diff --git a/Modules/_io/fileio.c b/Modules/_io/fileio.c
index a2a5f73..a685b13 100644
--- a/Modules/_io/fileio.c
+++ b/Modules/_io/fileio.c
@@ -367,8 +367,13 @@
            end of file (otherwise, it might be done only on the
            first write()). */
         PyObject *pos = portable_lseek(self->fd, NULL, 2);
-        if (pos == NULL)
+        if (pos == NULL) {
+            if (closefd) {
+                close(self->fd);
+                self->fd = -1;
+            }
             goto error;
+        }
         Py_DECREF(pos);
     }