| // build-fail | |
| // compile-flags: -C overflow-checks=on | |
| #![allow(arithmetic_overflow)] | |
| #![warn(const_err)] | |
| fn black_box<T>(_: T) { | |
| unimplemented!() | |
| } | |
| const FOO: u8 = [5u8][1]; | |
| //~^ WARN any use of this value will cause an error | |
| //~| WARN this was previously accepted by the compiler but is being phased out | |
| fn main() { | |
| black_box((FOO, FOO)); | |
| //~^ ERROR erroneous constant used | |
| //~| ERROR erroneous constant | |
| } |