diff options
Diffstat (limited to 'Objects')
| -rw-r--r-- | Objects/abstract.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Objects/abstract.c b/Objects/abstract.c index 37f7eea..3609948 100644 --- a/Objects/abstract.c +++ b/Objects/abstract.c @@ -1235,7 +1235,11 @@ PySequence_Tuple(PyObject *v) return null_error(); /* Special-case the common tuple and list cases, for efficiency. */ - if (PyTuple_Check(v)) { + if (PyTuple_CheckExact(v)) { + /* Note that we can't know whether it's safe to return + a tuple *subclass* instance as-is, hence the restriction + to exact tuples here. In contrasts, lists always make + a copy, so there's need for exactness below. */ Py_INCREF(v); return v; } |