commit de755129a7a14cb3bee89aa256ca2e4a9a6605ce
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Mon Apr 02 20:00:26 2018 -0700
committer GitHub <noreply@github.com> Mon Apr 02 20:00:26 2018 -0700
tree def922ae04796391ab9ad8f7e4649931ea281362
parent fa91aff07c16ad48a63580c2909934be92a5e9c8

bpo-33199: Initialize ma_version_tag in PyDict_Copy (GH-6341)

(cherry picked from commit d1c82c5cc7be0c21dddf86fd19c1702f6218459b)

Co-authored-by: INADA Naoki <methane@users.noreply.github.com>

Objects/dictobject.c

diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index bb4ea1f..be895d4 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -2551,6 +2551,7 @@
         split_copy->ma_values = newvalues;
         split_copy->ma_keys = mp->ma_keys;
         split_copy->ma_used = mp->ma_used;
+        split_copy->ma_version_tag = DICT_NEXT_VERSION();
         DK_INCREF(mp->ma_keys);
         for (i = 0, n = size; i < n; i++) {
             PyObject *value = mp->ma_values[i];