17 lines
465 B
Rust
17 lines
465 B
Rust
// A callee may not write to the destination of our `&mut` without us noticing.
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fn main() {
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let mut x = 15;
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let xraw = &mut x as *mut _;
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// Derived from raw value, so using raw value is still ok ...
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let xref = unsafe { &mut *xraw };
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callee(xraw);
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// ... though any use of raw value will invalidate our ref.
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let _val = *xref;
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//~^ ERROR: does not exist on the borrow stack
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}
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fn callee(xraw: *mut i32) {
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unsafe { *xraw = 15 };
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}
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