bpo-34457: Python/ast.c: Add missing NULL check to alias_for_import_name(). (GH-8852)

miss-islington · Alexey Izbyshev · web-flow · commit 0ef61ee7b194 · 2018-08-22T01:54:55.000-04:00
Reported by Svace static analyzer. (cherry picked from commit 28853a2) Co-authored-by: Alexey Izbyshev <izbyshev@ispras.ru>
diff --git a/Python/ast.c b/Python/ast.c
@@ -3267,6 +3267,8 @@ alias_for_import_name(struct compiling *c, const node *n, int store)
             break;
         case STAR:
             str = PyUnicode_InternFromString("*");
+            if (!str)
+                return NULL;
             if (PyArena_AddPyObject(c->c_arena, str) < 0) {
                 Py_DECREF(str);
                 return NULL;
