On Windows, select() does not accept empty lists.

Patch suggested by Guido, fixes SF item 611464.

Bugfix candidate, will backport to release22-maint myself.

Lib/asyncore.py

@@ -50,6 +50,7 @@ import exceptions
 import select
 import socket
 import sys
+import time
 
 import os
 from errno import EALREADY, EINPROGRESS, EWOULDBLOCK, ECONNRESET, \
@@ -100,10 +101,13 @@ def poll(timeout=0.0, map=None):
                 r.append(fd)
             if obj.writable():
                 w.append(fd)
+        if [] == r == w == e:
+            time.sleep(timeout)
+        else:
             try:
                 r, w, e = select.select(r, w, e, timeout)
             except select.error, err:
-            if err[0] != EINTR:
+                if err[0] not in (EINTR, ENOENT):
                     raise
 
         for fd in r: