commit 7e1d6308a3fc536719adcf1df0aa4e9953c12f8b
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Tue Jul 13 22:40:10 2021 -0700
committer GitHub <noreply@github.com> Tue Jul 13 22:40:10 2021 -0700
tree 5185e3fd3bd84c5691259a450dda567e2df4e926
parent b42eee78e7651693aa38c390f577e5d499dcf55d

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>

Modules/_tkinter.c

diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index 14101d9..329b291 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -3197,8 +3197,10 @@ _tkinter__flatten(PyObject *module, PyObject *item)
 
     context.size = 0;
 
-    if (!_flatten1(&context, item,0))
+    if (!_flatten1(&context, item, 0)) {
+        Py_XDECREF(context.tuple);
         return NULL;
+    }
 
     if (_PyTuple_Resize(&context.tuple, context.size))
         return NULL;