Patch #681152: Support escaped Unicode characters in classes. Fixes #612074.
Will backport to 2.2.
diff --git a/Lib/test/test_sre.py b/Lib/test/test_sre.py
index e4eb08d..db87162 100644
--- a/Lib/test/test_sre.py
+++ b/Lib/test/test_sre.py
@@ -96,6 +96,10 @@
# non-simple '*?' still recurses and hits the recursion limit
test(r"""sre.search('(a|b)*?c', 10000*'ab'+'cd').end(0)""", None, RuntimeError)
+# bug 612074
+pat=u"["+sre.escape(u"\u2039")+u"]"
+test(r"""sre.compile(pat) and 1""", 1, None)
+
if verbose:
print 'Running tests on sre.sub'