27 lines
687 B
Rust
27 lines
687 B
Rust
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// skip-filecheck
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//@ edition: 2021
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// In ed 2021 and below, we don't fallback `!` to `()`.
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// This would introduce a `! -> ()` coercion which would
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// be UB if we didn't disallow this explicitly.
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#![feature(never_type)]
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// EMIT_MIR uninhabited_not_read.main.SimplifyLocals-final.after.mir
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fn main() {
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// With a type annotation
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unsafe {
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let x = 3u8;
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let x: *const ! = &x as *const u8 as *const _;
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let _: ! = *x;
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}
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// Without a type annotation, make sure we don't implicitly coerce `!` to `()`
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// when we do the noop `*x`.
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unsafe {
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let x = 3u8;
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let x: *const ! = &x as *const u8 as *const _;
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let _ = *x;
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}
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}
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