error_expr_not_ok.nit:149,14--17: Error: Method or variable 'fail' unknown in Sys.
error_expr_not_ok.nit:149,7--24: Type error: expected A, got String
error_expr_not_ok.nit:150,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:150,7--17: Type error: expected A, got Int
+error_expr_not_ok.nit:150,7--18: Type error: expected A, got Int
error_expr_not_ok.nit:151,7--10: Error: Method or variable 'fail' unknown in Sys.
error_expr_not_ok.nit:152,7--10: Error: Method or variable 'fail' unknown in Sys.
error_expr_not_ok.nit:152,7--18: Type error: expected A, got Bool