T14761a.hs:13:10: error: [-Werror]
    • UNPACK pragma lacks '!' on the first argument of ‘A’
    • In the definition of data constructor ‘A’
      In the data type declaration for ‘A’

T14761a.hs:17:10: error: [-Werror]
    • UNPACK pragma lacks '!' on the first argument of ‘B’
    • In the definition of data constructor ‘B’
      In the data type declaration for ‘B’

T14761a.hs:20:3: error: [-Werror]
    • UNPACK pragma lacks '!' on the first argument of ‘MkG2’
    • In the definition of data constructor ‘MkG2’
      In the data type declaration for ‘G’