rust/tests/compile-fail/ptr_int_cast.rs

fn main() {
    let x = &1;
    // Casting down to u8 and back up to a pointer loses too much precision; this must not work.
    let x = x as *const i32;
    let x = x as u8; //~ ERROR constant evaluation error
    //~^ NOTE a raw memory access tried to access part of a pointer value as raw bytes
    let x = x as *const i32;
    let _ = unsafe { *x };
}
Make sure that casting a ptr-integer down to u8 makes it unusable 2017-06-22 19:47:09 -05:00			`fn main() {`
			`let x = &1;`
			`// Casting down to u8 and back up to a pointer loses too much precision; this must not work.`
handle ptr-int casts explicitly in cast.rs 2017-06-22 20:41:10 -05:00			`let x = x as *const i32;`
make sure we show error messages even when we cannot show span 2018-07-15 04:21:56 -05:00			`let x = x as u8; //~ ERROR constant evaluation error`
Convert some of the tests to the new format 2018-05-09 10:45:16 -05:00			`//~^ NOTE a raw memory access tried to access part of a pointer value as raw bytes`
handle ptr-int casts explicitly in cast.rs 2017-06-22 20:41:10 -05:00			`let x = x as *const i32;`
Make sure that casting a ptr-integer down to u8 makes it unusable 2017-06-22 19:47:09 -05:00			`let _ = unsafe { *x };`
			`}`