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2 changes: 1 addition & 1 deletion Lib/test/test_clinic.py
Original file line number Diff line number Diff line change
Expand Up @@ -153,7 +153,7 @@ def test_right_only(self):
def test_have_left_options_but_required_is_empty(self):
def fn():
clinic.permute_optional_groups(['a'], [], [])
self.assertRaises(AssertionError, fn)
self.assertRaises(ValueError, fn)


class ClinicLinearFormatTest(TestCase):
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3 changes: 2 additions & 1 deletion Tools/clinic/clinic.py
Original file line number Diff line number Diff line change
Expand Up @@ -495,7 +495,8 @@ def permute_optional_groups(left, required, right):
result = []

if not required:
assert not left
if left:
raise ValueError("required is empty but left is not")

accumulator = []
counts = set()
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