#2834: Change re module semantics, so that str and bytes mixing is forbidden,
and str (unicode) patterns get full unicode matching by default. The re.ASCII
flag is also introduced to ask for ASCII matching instead.
diff --git a/Lib/urllib/request.py b/Lib/urllib/request.py
index 889d9642..aaab059 100644
--- a/Lib/urllib/request.py
+++ b/Lib/urllib/request.py
@@ -141,7 +141,7 @@
_opener = None
# copied from cookielib.py
-_cut_port_re = re.compile(r":\d+$")
+_cut_port_re = re.compile(r":\d+$", re.ASCII)
def request_host(request):
"""Return request-host, as defined by RFC 2965.