diff -r 9f9ae5f7c4ae Lib/imaplib.py
--- a/Lib/imaplib.py	Tue Dec 17 21:27:56 2013 -0500
+++ b/Lib/imaplib.py	Wed Dec 18 10:29:06 2013 -0500
@@ -990,6 +990,11 @@
                 del self.tagged_commands[tag]
                 return result
 
+            # If we've seen a BYE at this point, the socket will be
+            # closed, so report the BYE now.
+
+            self._check_bye()
+
             # Some have reported "unexpected response" exceptions.
             # Note that ignoring them here causes loops.
             # Instead, send me details of the unexpected response and