Issue #15842: the SocketIO.{readable,writable,seekable} methods now raise ValueError when the file-like object is closed.
Patch by Alessandro Moura.
diff --git a/Misc/NEWS b/Misc/NEWS
index 24c6b71..29e2c19 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -120,6 +120,10 @@
 Library
 -------
 
+- Issue #15842: the SocketIO.{readable,writable,seekable} methods now
+  raise ValueError when the file-like object is closed.  Patch by Alessandro
+  Moura.
+
 - Issue #15881: Fixed atexit hook in multiprocessing.  Original patch
   by Chris McDonough.