1 files changed, 3 insertions, 1 deletions
diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c
index b354c033ae7..7b537af8c87 100644
--- a/Python/pylifecycle.c
+++ b/Python/pylifecycle.c
@@ -1261,7 +1261,9 @@ init_interp_main(PyThreadState *tstate)
             if (opt == NULL) {
                 return _PyStatus_ERR("can't initialize optimizer");
             }
-            PyUnstable_SetOptimizer((_PyOptimizerObject *)opt);
+            if (PyUnstable_SetOptimizer((_PyOptimizerObject *)opt)) {
+                return _PyStatus_ERR("can't initialize optimizer");
+            }
             Py_DECREF(opt);
         }
     }