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path: root/src/tools/miri/tests/fail/intrinsics/ptr_offset_unsigned_overflow.rs
blob: a0fa49d3d6f6b1f2300684f410091247695a1f1c (plain)
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fn main() {
    let x = &[0i32; 2];
    let x = x.as_ptr().wrapping_add(1);
    // 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`
}