[Python-checkins] bpo-43358: Fix bad free in assemble function (GH-24697)

[markshannon]

https://github.com/python/cpython/commit/503627fc2acb875b4c7b58a7f6e258cfcbad054b
commit: 503627fc2acb875b4c7b58a7f6e258cfcbad054b
branch: master
author: Alex Henrie <alexhenrie24 at gmail.com>
committer: markshannon <mark at hotpy.org>
date: 2021-03-02T10:20:25Z
summary:

bpo-43358: Fix bad free in assemble function (GH-24697)

files:
M Python/compile.c

diff --git a/Python/compile.c b/Python/compile.c
index 454005eb7b0cb..b0d3127ff6878 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -6664,12 +6664,12 @@ assemble(struct compiler *c, int addNone)
 
     for (basicblock *b = c->u->u_blocks; b != NULL; b = b->b_list) {
         if (normalize_basic_block(b)) {
-            goto error;
+            return NULL;
         }
     }
 
     if (ensure_exits_have_lineno(c)) {
-        goto error;
+        return NULL;
     }
 
     nblocks = 0;