T5455.hs:8:11: warning: [-Wincomplete-uni-patterns (in -Wall)]
    Pattern match(es) are non-exhaustive
    In a pattern binding: Patterns of type  ‘String’ not matched: []

T5455.hs:13:13: warning: [-Wincomplete-uni-patterns (in -Wall)]
    Pattern match(es) are non-exhaustive
    In a pattern binding: Patterns of type  ‘String’ not matched: []