From 84df7fe6a2ff20663a194d3758295bee9b1436ef Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Fri, 7 Nov 2014 21:43:57 +0200
Subject: Issues #814253, #9179: Group references and conditional group
 references now work in lookbehind assertions in regular expressions.

---
 Lib/re.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'Lib/re.py')

diff --git a/Lib/re.py b/Lib/re.py
index 199afee4b9..82244db3cd 100644
--- a/Lib/re.py
+++ b/Lib/re.py
@@ -352,10 +352,11 @@ class Scanner:
         s = sre_parse.Pattern()
         s.flags = flags
         for phrase, action in lexicon:
+            gid = s.opengroup()
             p.append(sre_parse.SubPattern(s, [
-                (SUBPATTERN, (len(p)+1, sre_parse.parse(phrase, flags))),
+                (SUBPATTERN, (gid, sre_parse.parse(phrase, flags))),
                 ]))
-        s.groups = len(p)+1
+            s.closegroup(gid, p[-1])
         p = sre_parse.SubPattern(s, [(BRANCH, (None, p))])
         self.scanner = sre_compile.compile(p)
     def scan(self, string):
-- 
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