commit 56cb465cc93dcb35aaf7266ca3dbe2dcff1fac5f
author Serhiy Storchaka <storchaka@gmail.com> Fri Oct 20 17:08:15 2017 +0300
committer GitHub <noreply@github.com> Fri Oct 20 17:08:15 2017 +0300
tree b9bce18e156f23827247be42659d6fe99cd5c1cd
parent 525f40d231aba2c004619fc7a5207171ed65b0cb

bpo-31825: Fixed OverflowError in the 'unicode-escape' codec (#4058)

and in codecs.escape_decode() when decode an escaped non-ascii byte.

Objects/unicodeobject.c

diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index bb1c083..2f30877 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -6136,7 +6136,7 @@
     if (first_invalid_escape != NULL) {
         if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
                              "invalid escape sequence '\\%c'",
-                             *first_invalid_escape) < 0) {
+                             (unsigned char)*first_invalid_escape) < 0) {
             Py_DECREF(result);
             return NULL;
         }