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25 lines
572 B
Rust
25 lines
572 B
Rust
use std::cell::Cell;
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use std::rc::Rc;
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fn send<T: Send>(_: T) {}
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fn main() {}
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// Cycles should work as the deferred obligations are
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// independently resolved and only require the concrete
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// return type, which can't depend on the obligation.
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fn cycle1() -> impl Clone {
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//~^ ERROR cycle detected
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//~| ERROR cycle detected
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send(cycle2().clone());
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Rc::new(Cell::new(5))
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}
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fn cycle2() -> impl Clone {
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send(cycle1().clone());
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//~^ ERROR: cannot check whether the hidden type of opaque type satisfies auto traits
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Rc::new(String::from("foo"))
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}
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