1 files changed, 5 insertions, 0 deletions
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index a73b8cb..352fb83 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -2636,6 +2636,11 @@ zip_next(zipobject *lz)
             PyTuple_SET_ITEM(result, i, item);
             Py_DECREF(olditem);
         }
+        // bpo-42536: The GC may have untracked this result tuple. Since we're
+        // recycling it, make sure it's tracked again:
+        if (!_PyObject_GC_IS_TRACKED(result)) {
+            _PyObject_GC_TRACK(result);
+        }
     } else {
         result = PyTuple_New(tuplesize);
         if (result == NULL)