From: Benjamin Peterson <benjamin@python.org>
Date: Wed, 8 Mar 2017 06:24:44 +0000 (-0800)
Subject: allow the first call to wcsxfrm to return ERANGE (#536)
X-Git-Tag: v3.7.0a1~1178
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ad4a0cc519a5bb14204324e0e32e976318f9e6ce;p=python

allow the first call to wcsxfrm to return ERANGE (#536)

If the output buffer provided to wcsxfrm is too small, errno is set to ERANGE. We should not error out in that case.
---

diff --git a/Modules/_localemodule.c b/Modules/_localemodule.c
index f5c126a7a1..ecd673e4a7 100644
--- a/Modules/_localemodule.c
+++ b/Modules/_localemodule.c
@@ -262,7 +262,7 @@ PyLocale_strxfrm(PyObject* self, PyObject* args)
     }
     errno = 0;
     n2 = wcsxfrm(buf, s, n1);
-    if (errno) {
+    if (errno && errno != ERANGE) {
         PyErr_SetFromErrno(PyExc_OSError);
         goto exit;
     }