bpo-44608: Fix memory leak in _tkinter._flatten() (GH-27107)

if it is called with a sequence or set, but not list or tuple.
(cherry picked from commit f572cbf1faab33d9afbbe3e95738ed6fbe6e48e6)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

Miss Islington (bot) committed 4y ago

7e1d6308a3fc536719adcf1df0aa4e9953c12f8b

Parent: b42eee7

Committed by GitHub <noreply@github.com> on 7/14/2021, 5:40:10 AM