ptr_offset_unsigned_overflow: extend test
This commit is contained in:
parent
ba86cf8686
commit
4854ca7411
@ -1,7 +1,8 @@
|
||||
fn main() {
|
||||
let x = &[0i32; 2];
|
||||
let x = x.as_ptr().wrapping_add(1);
|
||||
// If the `!0` is interpreted as `isize`, it is just `-1` and hence harmless.
|
||||
// However, this is unsigned arithmetic, so really this is `usize::MAX` and hence UB.
|
||||
unsafe { x.byte_add(!0).read() }; //~ERROR: does not fit in an `isize`
|
||||
// If `usize::MAX` is interpreted as `isize`, it is just `-1` and hence harmless.
|
||||
let _ = unsafe { x.byte_offset(usize::MAX as isize) };
|
||||
// However, `byte_add` uses unsigned arithmetic, so really this is `usize::MAX` and hence UB.
|
||||
let _ = unsafe { x.byte_add(usize::MAX) }; //~ERROR: does not fit in an `isize`
|
||||
}
|
||||
|
@ -1,8 +1,8 @@
|
||||
error: Undefined Behavior: overflowing pointer arithmetic: the total offset in bytes does not fit in an `isize`
|
||||
--> tests/fail/intrinsics/ptr_offset_unsigned_overflow.rs:LL:CC
|
||||
|
|
||||
LL | unsafe { x.byte_add(!0).read() };
|
||||
| ^^^^^^^^^^^^^^ overflowing pointer arithmetic: the total offset in bytes does not fit in an `isize`
|
||||
LL | let _ = unsafe { x.byte_add(usize::MAX) };
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^ overflowing pointer arithmetic: the total offset in bytes does not fit in an `isize`
|
||||
|
|
||||
= help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
|
||||
= help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
|
||||
|
Loading…
Reference in New Issue
Block a user