Issue #23051: multiprocessing.Pool methods imap() and imap_unordered() now

handle exceptions raised by an iterator.  Patch by Alon Diamant and Davin
Potts.

diff --cc Lib/multiprocessing/pool.py
Simple merge

diff --cc Lib/test/_test_multiprocessing.py
Simple merge

diff --cc Misc/ACKS
Simple merge

diff --cc Misc/NEWS
index 64d77aa59b5ae8d54aa831cf1f5d9cf345b39dab,793cc107417de54a851792dc6ccd421f6775f592..78fca4dd24477312cdcae4ad3e5f4ac60051e2fa
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -18,12 -18,10 +18,16 @@@ Core and Builtin
  Library
  -------
  
+ - Issue #23051: multiprocessing.Pool methods imap() and imap_unordered() now
+   handle exceptions raised by an iterator.  Patch by Alon Diamant and Davin
+   Potts.
+ 
 +- Issue #23581: Add matmul support to MagicMock. Patch by Håkan Lövdahl.
 +
 +- Issue #23566: enable(), register(), dump_traceback() and
 +  dump_traceback_later() functions of faulthandler now accept file
 +  descriptors. Patch by Wei Wu.
 +
  - Issue #22928: Disabled HTTP header injections in http.client.
    Original patch by Demian Brecht.