24 lines
481 B
Rust
24 lines
481 B
Rust
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// issue-49296: Unsafe shenigans in constants can result in missing errors
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#![feature(const_fn)]
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#![feature(const_fn_union)]
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const unsafe fn transmute<T: Copy, U: Copy>(t: T) -> U {
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union Transmute<T: Copy, U: Copy> {
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from: T,
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to: U,
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}
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Transmute { from: t }.to
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}
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const fn wat(x: u64) -> &'static u64 {
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unsafe { transmute(&x) }
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}
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const X: u64 = *wat(42);
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//~^ ERROR any use of this value will cause an error
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fn main() {
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println!("{}", X);
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}
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