26 lines
1000 B
Rust
26 lines
1000 B
Rust
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// Checks that we don't get conflicting arguments in our debug info with a particular async function
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// structure.
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// edition:2021
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// compile-flags: -Cdebuginfo=2
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// build-pass
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#![crate_type = "lib"]
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use std::future::Future;
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// The compiler produces a closure as part of this function. That closure initially takes an
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// argument _task_context. Later, when the MIR for that closure is transformed into a generator
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// state machine, _task_context is demoted to not be an argument, but just part of an unnamed
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// argument. If we emit debug info saying that both _task_context and the unnamed argument are both
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// argument number 2, then LLVM will fail with "conflicting debug info for argument". See
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// https://github.com/rust-lang/rust/pull/109466#issuecomment-1500879195 for details.
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async fn recv_unit() {
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std::future::ready(()).await;
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}
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pub fn poll_recv() {
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// This box is necessary in order to reproduce the problem.
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let _: Box<dyn Future<Output = ()>> = Box::new(recv_unit());
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}
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