16 lines
439 B
Rust
16 lines
439 B
Rust
// A callee may not write to the destination of our `&mut` without
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// 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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let xref = unsafe { &mut *xraw }; // derived from raw, so using raw is still okay...
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callee(xraw);
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let _val = *xref; // ...but any use of raw will invalidate our ref.
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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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