1 files changed, 7 insertions, 3 deletions
diff --git a/Objects/capsule.c b/Objects/capsule.c
index 555979d..28965e0 100644
--- a/Objects/capsule.c
+++ b/Objects/capsule.c
@@ -317,10 +317,14 @@ static int
 capsule_traverse(PyCapsule *capsule, visitproc visit, void *arg)
 {
     // Capsule object is only tracked by the GC
-    // if _PyCapsule_SetTraverse() is called
-    assert(capsule->traverse_func != NULL);
+    // if _PyCapsule_SetTraverse() is called, but
+    // this can still be manually triggered by gc.get_referents()
+
+    if (capsule->traverse_func != NULL) {
+        return capsule->traverse_func((PyObject*)capsule, visit, arg);
+    }
 
-    return capsule->traverse_func((PyObject*)capsule, visit, arg);
+    return 0;
 }