rust/tests/compile-fail/modifying_constants.rs


fn main() {
    let x = &1; // the `&1` is promoted to a constant, but it used to be that only the pointer is marked static, not the pointee
    let y = unsafe { &mut *(x as *const i32 as *mut i32) };
    *y = 42;  //~ ERROR constant evaluation error
    //~^ NOTE tried to modify constant memory
    assert_eq!(*x, 42);
}
Ignore tests the bool thing will be fixed by the validation I have planned, and we already ignored another test around modifing constants. 2018-07-24 15:29:08 -05:00
deallocate all locals on function exit and transitively freeze constants through pointers 2016-11-17 07:48:34 -06:00			`fn main() {`
freeze -> static 2017-02-07 13:28:54 -06:00			let x = &1; // the `&1` is promoted to a constant, but it used to be that only the pointer is marked static, not the pointee
deallocate all locals on function exit and transitively freeze constants through pointers 2016-11-17 07:48:34 -06:00			`let y = unsafe { &mut (x as const i32 as *mut i32) };`
make sure we show error messages even when we cannot show span 2018-07-15 04:21:56 -05:00			`*y = 42; //~ ERROR constant evaluation error`
Convert some of the tests to the new format 2018-05-09 10:45:16 -05:00			`//~^ NOTE tried to modify constant memory`
deallocate all locals on function exit and transitively freeze constants through pointers 2016-11-17 07:48:34 -06:00			`assert_eq!(*x, 42);`
			`}`