From 70b72f0f96d0a78e7cb154ae64356c82d06ac901 Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Tue, 8 Nov 2016 23:12:46 +0200
Subject: [PATCH] Fixed possible abort in ceval loop if _PyUnicode_FromId()
 fails. Every opcode should end with DISPATCH() or goto error.

---
 Python/ceval.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Python/ceval.c b/Python/ceval.c
index e9d0cbb9763..7b405188d38 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -2196,7 +2196,7 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
             else {
                 PyObject *build_class_str = _PyUnicode_FromId(&PyId___build_class__);
                 if (build_class_str == NULL)
-                    break;
+                    goto error;
                 bc = PyObject_GetItem(f->f_builtins, build_class_str);
                 if (bc == NULL) {
                     if (PyErr_ExceptionMatches(PyExc_KeyError))