18 lines
658 B
Rust
18 lines
658 B
Rust
//@compile-flags: -Zmiri-permissive-provenance
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fn main() {
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unsafe {
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let root = &mut 42;
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let addr = root as *mut i32 as usize;
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let exposed_ptr = addr as *mut i32;
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// From the exposed ptr, we get a new SRO ptr.
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let root2 = &*exposed_ptr;
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// Stack: Unknown(<N), SRO(N), SRO(N+1)
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// And we test that it is read-only by doing a conflicting write.
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// (The write is still fine, using the `root as *mut i32` provenance which got exposed.)
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*exposed_ptr = 0;
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// Stack: Unknown(<N)
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let _val = *root2; //~ ERROR: /read access .* tag does not exist in the borrow stack/
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}
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}
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