commit 57f91ac95aec1922ba104019a81a6508485862c4
author Victor Stinner <victor.stinner@gmail.com> Mon Sep 12 13:37:07 2016 +0200
committer Victor Stinner <victor.stinner@gmail.com> Mon Sep 12 13:37:07 2016 +0200
tree cbf2300bab2d6c2bcb6f0b08b30be4ce2290c4e2
parent b8d768b0199c55d408f5c8b86d14555aa7be9f98

Document kwnames in _PyObject_FastCallKeywords() and _PyStack_AsDict()

Issue #27213.

Python/ceval.c

diff --git a/Python/ceval.c b/Python/ceval.c
index c9ac03f..ff36d36 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -4863,7 +4863,12 @@
     Py_ssize_t nkwargs = (kwnames == NULL) ? 0 : PyTuple_GET_SIZE(kwnames);
     Py_ssize_t nd;
 
+    assert(PyFunction_Check(func));
+    assert(nargs >= 0);
+    assert(kwnames == NULL || PyTuple_CheckExact(kwnames));
     assert((nargs == 0 && nkwargs == 0) || stack != NULL);
+    /* kwnames must only contains str strings, no subclass, and all keys must
+       be unique */
 
     PCALL(PCALL_FUNCTION);
     PCALL(PCALL_FAST_FUNCTION);