Looks like an oopsie -- I ignored a warning at my peril.

diff --git a/Python/compile.c b/Python/compile.c
index 0f5fd2dfde25280e0b5600305d67bef1072a9d2f..cbb6b4d61a486c896e70324db78e812c3bc02dde 100644 (file)
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -2972,7 +2972,8 @@ expr_constant(expr_ty e)
                return PyObject_IsTrue(e->v.Str.s);
        case Name_kind:
                /* optimize away names that can't be reassigned */
-               id = _PyUnicode_AsDefaultEncodedString(e->v.Name.id, NULL);
+               id = PyString_AS_STRING(
+                    _PyUnicode_AsDefaultEncodedString(e->v.Name.id, NULL));
                if (strcmp(id, "True") == 0) return 1;
                if (strcmp(id, "False") == 0) return 0;
                if (strcmp(id, "None") == 0) return 0;