mirror of https://github.com/rust-lang/rust
25 lines
465 B
Rust
25 lines
465 B
Rust
#![feature(negative_impls)]
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//@ edition:2018
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// This tests the specialized async-await-specific error when futures don't implement an
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// auto trait (which is specifically Sync) due to some type that was captured.
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struct Foo;
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impl !Sync for Foo {}
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fn is_sync<T: Sync>(t: T) { }
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async fn bar() {
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let x = Foo;
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baz().await;
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drop(x);
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}
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async fn baz() { }
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fn main() {
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is_sync(bar());
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//~^ ERROR future cannot be shared between threads safely
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}
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