commit 602d307ac5e8a2da38a193dca3bdfef5994dfe67
author Zackery Spytz <zspytz@gmail.com> Fri Dec 07 05:17:43 2018 -0700
committer Serhiy Storchaka <storchaka@gmail.com> Fri Dec 07 14:17:43 2018 +0200
tree 8e876e0142683a7564a391dc6396bc6d33f08639
parent 2db190bb356d00422087e1286637887efb8d97c5

bpo-35436: Add missing PyErr_NoMemory() calls and other minor bug fixes. (GH-11015) (GH-11020)

(cherry picked from commit 4c49da0cb7434c676d70b9ccf38aca82ac0d64a9)

Python/marshal.c

diff --git a/Python/marshal.c b/Python/marshal.c
index 6d06266..7d60614 100644
--- a/Python/marshal.c
+++ b/Python/marshal.c
@@ -689,11 +689,12 @@
         p->buf_size = n;
     }
     else if (p->buf_size < n) {
-        p->buf = PyMem_REALLOC(p->buf, n);
-        if (p->buf == NULL) {
+        char *tmp = PyMem_REALLOC(p->buf, n);
+        if (tmp == NULL) {
             PyErr_NoMemory();
             return NULL;
         }
+        p->buf = tmp;
         p->buf_size = n;
     }