From 63dc548109c4f5e17280382831b93fb8e9da9207 Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Thu, 22 Sep 2016 19:41:20 +0300
Subject: Issue #28086: Single var-positional argument of tuple subtype was
 passed unscathed to the C-defined function.  Now it is converted to exact
 tuple.

---
 Python/ceval.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'Python/ceval.c')

diff --git a/Python/ceval.c b/Python/ceval.c
index ff36d365b3..39cf33019d 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -3310,7 +3310,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
             }
             callargs = POP();
             func = TOP();
-            if (!PyTuple_Check(callargs)) {
+            if (!PyTuple_CheckExact(callargs)) {
                 if (Py_TYPE(callargs)->tp_iter == NULL &&
                         !PySequence_Check(callargs)) {
                     PyErr_Format(PyExc_TypeError,
@@ -3327,7 +3327,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
                     goto error;
                 }
             }
-            assert(PyTuple_Check(callargs));
+            assert(PyTuple_CheckExact(callargs));
 
             result = do_call_core(func, callargs, kwargs);
             Py_DECREF(func);
-- 
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