3 Ambiguous occurrence `+'
4 It could refer to: +: defined at tcfail037.hs:10
5 PrelBase.+: imported from Prelude at tcfail037.hs:3
8 Ambiguous occurrence `+'
9 It could refer to: +: defined at tcfail037.hs:10
10 PrelBase.+: imported from Prelude at tcfail037.hs:3
13 Ambiguous occurrence `+'
14 It could refer to: +: defined at tcfail037.hs:10
15 PrelBase.+: imported from Prelude at tcfail037.hs:3
18 Compilation had errors