tcfail018.hs:5: No instance for: `PrelBase.Num [taBB]'
    arising from the literal 1 at tcfail018.hs:5
 
tcfail018.hs:5: No instance for: `PrelBase.Num [taBB]'
    arising from the literal 1 at tcfail018.hs:5


Compilation had errors