ghc/tests/typecheck/should_fail/tcfail010.stderr

   1
   2 tcfail010.hs:3:
   3     Ambiguous type variable(s) `$0'
   4         in the constraint `Num [$0]'
   5         arising from use of `+' at tcfail010.hs:3
   6
   7
   8 Compilation had errors