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35 lines
716 B
Rust
35 lines
716 B
Rust
// Incorrect handling of uninhabited types could cause us to mark generator
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// types as entirely uninhabited, when they were in fact constructible. This
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// caused us to hit "unreachable" code (illegal instruction on x86).
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// run-pass
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// compile-flags: --edition=2018 -Aunused
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pub enum Uninhabited { }
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fn uninhabited_async() -> Uninhabited {
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unreachable!()
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}
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async fn noop() { }
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async fn contains_never() {
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let error = uninhabited_async();
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noop().await;
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let error2 = error;
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}
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async fn overlap_never() {
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let error1 = uninhabited_async();
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noop().await;
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let error2 = uninhabited_async();
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drop(error1);
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noop().await;
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drop(error2);
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}
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#[allow(unused_must_use)]
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fn main() {
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}
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