commit 1e7b858575d0ad782939f86aae4a2fa1c29e9f14
author Nick Coghlan <ncoghlan@gmail.com> Thu Apr 29 15:58:44 2021 +1000
committer GitHub <noreply@github.com> Wed Apr 28 22:58:44 2021 -0700
tree 9445a7a82905c5bb253564853f33dacfceac6e93
parent e52ab42cedd2a5ef4c3c1a47d0cf96a8f06d051f

bpo-43892: Make match patterns explicit in the AST (GH-25585)

Co-authored-by: Brandt Bucher <brandtbucher@gmail.com>

Python/bltinmodule.c

diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 3b0e59a..66a74cb 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -831,11 +831,7 @@ builtin_compile_impl(PyObject *module, PyObject *source, PyObject *filename,
             if (arena == NULL)
                 goto error;
             mod = PyAST_obj2mod(source, arena, compile_mode);
-            if (mod == NULL) {
-                _PyArena_Free(arena);
-                goto error;
-            }
-            if (!_PyAST_Validate(mod)) {
+            if (mod == NULL || !_PyAST_Validate(mod)) {
                 _PyArena_Free(arena);
                 goto error;
             }