let y = first ((1,2.0,3));
//~^ ERROR mismatched types
//~| expected type `(isize, f64)`
- //~| found type `(isize, f64, _)`
+ //~| found type `(isize, f64, {integer})`
//~| expected a tuple with 2 elements, found one with 3 elements
let y = first ((1,));