ghc/tests/typecheck/should_fail/tcfail037.stderr

   1
   2 tcfail037.hs:7:
   3     Ambiguous occurrence `+'
   4     It could refer to either `ShouldFail.+', defined at tcfail037.hs:10
   5                           or `PrelNum.+', imported from Prelude at tcfail037.hs:3 ()