T14916.stderr 366 Bytes
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T14916.hs:7:24: error:
    • Illegal instance declaration for ‘A ~ A’
        Manual instances of this class are not permitted.
    • In the data declaration for ‘A’

T14916.hs:8:24: error:
    • Illegal instance declaration for ‘Coercible B B’
        Manual instances of this class are not permitted.
    • In the data declaration for ‘B’