I've just rebuilt on Windows against tip. test_glob is failing:

test test_glob failed -- Traceback (most recent call last):
  File "c:\work-in-progress\python\cpython-9584\lib\test\test_glob.py", line 135, in test_glob_curly_braces
    os.path.join('a', 'bcd', 'efg')]))
  File "c:\work-in-progress\python\cpython-9584\lib\test\test_glob.py", line 53, in assertSequencesEqual_noorder
    self.assertEqual(set(l1), set(l2))
AssertionError: Items in the first set but not the second:
'@test_2788_tmp_dir\\a/bcd\\efg'
'@test_2788_tmp_dir\\a/bcd\\EF'
Items in the second set but not the first:
'@test_2788_tmp_dir\\a\\bcd\\EF'
'@test_2788_tmp_dir\\a\\bcd\\efg'