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