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avoid mixing accesses of ptrs derived from a mutable ref and parent ptrs #107954

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Feb 13, 2023
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avoid mixing accesses of ptrs derived from a mutable ref and parent ptrs #107954

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6 changes: 3 additions & 3 deletions library/core/tests/ptr.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,7 @@ fn test() {
snd: isize,
}
let mut p = Pair { fst: 10, snd: 20 };
let pptr: *mut Pair = &mut p;
let pptr: *mut Pair = addr_of_mut!(p);
let iptr: *mut isize = pptr as *mut isize;
assert_eq!(*iptr, 10);
*iptr = 30;
Expand Down Expand Up @@ -1070,8 +1070,8 @@ fn swap_copy_untyped() {
let mut x = 5u8;
let mut y = 6u8;

let ptr1 = &mut x as *mut u8 as *mut bool;
let ptr2 = &mut y as *mut u8 as *mut bool;
let ptr1 = addr_of_mut!(x).cast::<bool>();
let ptr2 = addr_of_mut!(y).cast::<bool>();

unsafe {
ptr::swap(ptr1, ptr2);
Expand Down