commit 122fb562d4f61a4862e05987f48d637b885bfeb6
author Victor Stinner <victor.stinner@gmail.com> Wed Feb 01 17:04:52 2017 +0100
committer Victor Stinner <victor.stinner@gmail.com> Wed Feb 01 17:04:52 2017 +0100
tree 7c56098d6822195607929ba8360511021bfee950
parent f94b68a025e9b35d5b612d815818b4e9e1c55fcc

Document that _PyFunction_FastCallDict() must copy kwargs

Issue #29318: Caller and callee functions must not share the dictionary:
kwargs must be copied.

Python/ceval.c

diff --git a/Python/ceval.c b/Python/ceval.c
index 8738470..298ad55 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -5039,6 +5039,8 @@
     if (nk != 0) {
         Py_ssize_t pos, i;
 
+        /* Issue #29318: Caller and callee functions must not share the
+           dictionary: kwargs must be copied. */
         kwtuple = PyTuple_New(2 * nk);
         if (kwtuple == NULL) {
             return NULL;