merge heads

diff --cc Misc/NEWS
index 7f165dbdeec275854c937d5aee8a97d42e4aa5c0,6bb4215d029c0ada2fc11576db7cdd7917c6f9ca..79f49569b0d4d62d42c947f5813165ac9a1ecc40
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -11,7 -11,13 +11,9 @@@ Core and Builtin
  
  Library
  -------
+ - Issue #14010: Fix a crash when iterating or deleting deeply nested filters
+   in itertools module (i.e. itertools.izip(), itertools.chain(), etc).
  
 -- Issue #14254: IDLE now handles readline correctly across shell restarts.
 -
 -- Issue #17614: IDLE no longer raises exception when quickly closing a file.
 -
  - Issue #13163: Rename operands in smtplib.SMTP._get_socket to correct names;
    fixes otherwise misleading output in tracebacks and when when debug is on.