16 lines
627 B
Rust
16 lines
627 B
Rust
// Some optimizations remove ZST accesses, thus masking this UB.
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//@compile-flags: -Zmir-opt-level=0
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fn main() {
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// Not using the () type here, as writes of that type do not even have MIR generated.
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// Also not assigning directly as that's array initialization, not assignment.
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let zst_val = [1u8; 0];
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// make sure ZST accesses are checked against being "truly" dangling pointers
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// (into deallocated allocations).
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let mut x_box = Box::new(1u8);
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let x = &mut *x_box as *mut _ as *mut [u8; 0];
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drop(x_box);
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unsafe { *x = zst_val }; //~ ERROR: dereferenced after this allocation got freed
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}
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