19 lines
541 B
Rust
19 lines
541 B
Rust
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use std::mem;
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#[allow(unused)]
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struct MySlice {
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prefix: u64,
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tail: [u8],
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}
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#[cfg(target_pointer_width = "64")]
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const TOO_BIG: usize = 1usize << 47;
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#[cfg(target_pointer_width = "32")]
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const TOO_BIG: usize = 1usize << 31;
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fn main() { unsafe {
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let ptr = Box::into_raw(Box::new(0u8));
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// The slice part is actually not "too big", but together with the `prefix` field it is.
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let _x: &MySlice = mem::transmute((ptr, TOO_BIG-1)); //~ ERROR: invalid reference metadata: total size is bigger than largest supported object
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} }
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