def test_issue3549(en_vocab):
    """Test that match pattern validation doesn't raise on empty errors."""
    matcher = Matcher(en_vocab, validate=True)
    pattern = [{"LOWER": "hello"}, {"LOWER": "world"}]
    matcher.add("GOOD", [pattern])
    with pytest.raises(MatchPatternError):
        matcher.add("BAD", [[{"X": "Y"}]])
Test that match pattern validation doesn't raise on empty errors.
spacy/tests/matcher/test_matcher_logic.py