Issue #16688: Fix backreferences did make case-insensitive regex fail on non-ASCII strings.
Patch by Matthew Barnett.
diff --git a/Lib/test/test_re.py b/Lib/test/test_re.py
index 360ba72..b945203 100644
--- a/Lib/test/test_re.py
+++ b/Lib/test/test_re.py
@@ -968,6 +968,11 @@
self.assertEqual(r, s)
self.assertEqual(n, size + 1)
+ def test_bug_16688(self):
+ # Issue 16688: Backreferences make case-insensitive regex fail on
+ # non-ASCII strings.
+ self.assertEqual(re.findall(r"(?i)(a)\1", "aa \u0100"), ['a'])
+ self.assertEqual(re.match(r"(?s).{1,3}", "\u0100\u0100").span(), (0, 2))
def run_re_tests():
from test.re_tests import tests, SUCCEED, FAIL, SYNTAX_ERROR