[INFO] fetching crate async-iterator 2.2.0...
[INFO] testing async-iterator-2.2.0 against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] extracting crate async-iterator 2.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate async-iterator 2.2.0 on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate async-iterator 2.2.0
[INFO] finished tweaking crates.io crate async-iterator 2.2.0
[INFO] tweaked toml for crates.io crate async-iterator 2.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab216c0b3be115a6f70597d9c54a69ded7650263e9803923f95e40b9932d0535
[INFO] running `Command { std: "docker" "start" "-a" "ab216c0b3be115a6f70597d9c54a69ded7650263e9803923f95e40b9932d0535", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab216c0b3be115a6f70597d9c54a69ded7650263e9803923f95e40b9932d0535", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab216c0b3be115a6f70597d9c54a69ded7650263e9803923f95e40b9932d0535", kill_on_drop: false }`
[INFO] [stdout] ab216c0b3be115a6f70597d9c54a69ded7650263e9803923f95e40b9932d0535
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6258a18dbd124410e5536d416bf10c3de59597a2baf72b856b6e0339c2443e21
[INFO] running `Command { std: "docker" "start" "-a" "6258a18dbd124410e5536d416bf10c3de59597a2baf72b856b6e0339c2443e21", kill_on_drop: false }`
[INFO] [stderr]    Compiling async-iterator v2.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `return_position_impl_trait_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | #![feature(return_position_impl_trait_in_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `async_fn_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | #![feature(async_fn_in_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]  --> src/extend.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn extend<T>(&mut self, iter: T)
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout]   = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]   |
[INFO] [stdout] 8 -     async fn extend<T>(&mut self, iter: T)
[INFO] [stdout] 8 +     fn extend<T>(&mut self, iter: T) -> impl std::future::Future<Output = ()> + Send
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]  --> src/from_iterator.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]   |
[INFO] [stdout] 8 -     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stdout] 8 +     fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> impl std::future::Future<Output = Self> + Send;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/into_iterator.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 12 -     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stdout] 12 +     fn into_iter(self) -> impl std::future::Future<Output = Self::IntoIter> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/iter/mod.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 19 -     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stdout] 19 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/iter/mod.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     async fn collect<B: FromIterator<Self::Item>>(self) -> B
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 38 ~     fn collect<B: FromIterator<Self::Item>>(self) -> impl std::future::Future<Output = B> + Send
[INFO] [stdout] 39 |     where
[INFO] [stdout] 40 |         Self: Sized,
[INFO] [stdout] 41 ~     {async {
[INFO] [stdout] 42 |         let fut = <B as crate::FromIterator<_>>::from_iter(self);
[INFO] [stdout] 43 |         fut.await
[INFO] [stdout] 44 ~     } }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/lending_iter/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 11 -     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stdout] 11 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item<'_>>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "6258a18dbd124410e5536d416bf10c3de59597a2baf72b856b6e0339c2443e21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6258a18dbd124410e5536d416bf10c3de59597a2baf72b856b6e0339c2443e21", kill_on_drop: false }`
[INFO] [stdout] 6258a18dbd124410e5536d416bf10c3de59597a2baf72b856b6e0339c2443e21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 508f410fe95ff27e5b37cdd6d06a1c9c99c033c15fefdccb5d99715fc7d30c44
[INFO] running `Command { std: "docker" "start" "-a" "508f410fe95ff27e5b37cdd6d06a1c9c99c033c15fefdccb5d99715fc7d30c44", kill_on_drop: false }`
[INFO] [stdout] warning: the feature `return_position_impl_trait_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | #![feature(return_position_impl_trait_in_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `async_fn_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | #![feature(async_fn_in_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]  --> src/extend.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn extend<T>(&mut self, iter: T)
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout]   = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]   |
[INFO] [stdout] 8 -     async fn extend<T>(&mut self, iter: T)
[INFO] [stdout] 8 +     fn extend<T>(&mut self, iter: T) -> impl std::future::Future<Output = ()> + Send
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]  --> src/from_iterator.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]   |
[INFO] [stdout] 8 -     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stdout] 8 +     fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> impl std::future::Future<Output = Self> + Send;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling async-iterator v2.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/into_iterator.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 12 -     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stdout] 12 +     fn into_iter(self) -> impl std::future::Future<Output = Self::IntoIter> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/iter/mod.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 19 -     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stdout] 19 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/iter/mod.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     async fn collect<B: FromIterator<Self::Item>>(self) -> B
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 38 ~     fn collect<B: FromIterator<Self::Item>>(self) -> impl std::future::Future<Output = B> + Send
[INFO] [stdout] 39 |     where
[INFO] [stdout] 40 |         Self: Sized,
[INFO] [stdout] 41 ~     {async {
[INFO] [stdout] 42 |         let fut = <B as crate::FromIterator<_>>::from_iter(self);
[INFO] [stdout] 43 |         fut.await
[INFO] [stdout] 44 ~     } }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/lending_iter/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 11 -     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stdout] 11 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item<'_>>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `return_position_impl_trait_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | #![feature(return_position_impl_trait_in_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `async_fn_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | #![feature(async_fn_in_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]  --> src/extend.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn extend<T>(&mut self, iter: T)
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout]   = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]   |
[INFO] [stdout] 8 -     async fn extend<T>(&mut self, iter: T)
[INFO] [stdout] 8 +     fn extend<T>(&mut self, iter: T) -> impl std::future::Future<Output = ()> + Send
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]  --> src/from_iterator.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]   |
[INFO] [stdout] 8 -     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stdout] 8 +     fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> impl std::future::Future<Output = Self> + Send;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/into_iterator.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 12 -     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stdout] 12 +     fn into_iter(self) -> impl std::future::Future<Output = Self::IntoIter> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/iter/mod.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 19 -     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stdout] 19 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/iter/mod.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     async fn collect<B: FromIterator<Self::Item>>(self) -> B
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 38 ~     fn collect<B: FromIterator<Self::Item>>(self) -> impl std::future::Future<Output = B> + Send
[INFO] [stdout] 39 |     where
[INFO] [stdout] 40 |         Self: Sized,
[INFO] [stdout] 41 ~     {async {
[INFO] [stdout] 42 |         let fut = <B as crate::FromIterator<_>>::from_iter(self);
[INFO] [stdout] 43 |         fut.await
[INFO] [stdout] 44 ~     } }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/lending_iter/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 11 -     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stdout] 11 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item<'_>>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "508f410fe95ff27e5b37cdd6d06a1c9c99c033c15fefdccb5d99715fc7d30c44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "508f410fe95ff27e5b37cdd6d06a1c9c99c033c15fefdccb5d99715fc7d30c44", kill_on_drop: false }`
[INFO] [stdout] 508f410fe95ff27e5b37cdd6d06a1c9c99c033c15fefdccb5d99715fc7d30c44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1ddde4a954d1f347b401c4e231b340bb540e55028ae2f98b072b6e3f791406dc
[INFO] running `Command { std: "docker" "start" "-a" "1ddde4a954d1f347b401c4e231b340bb540e55028ae2f98b072b6e3f791406dc", kill_on_drop: false }`
[INFO] [stderr] warning: the feature `return_position_impl_trait_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/lib.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 | #![feature(return_position_impl_trait_in_trait)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `async_fn_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/lib.rs:23:12
[INFO] [stderr]    |
[INFO] [stderr] 23 | #![feature(async_fn_in_trait)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stderr]  --> src/extend.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     async fn extend<T>(&mut self, iter: T)
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stderr]   = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stderr] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stderr]   |
[INFO] [stderr] 8 -     async fn extend<T>(&mut self, iter: T)
[INFO] [stderr] 8 +     fn extend<T>(&mut self, iter: T) -> impl std::future::Future<Output = ()> + Send
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stderr]  --> src/from_iterator.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stderr] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stderr]   |
[INFO] [stderr] 8 -     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stderr] 8 +     fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> impl std::future::Future<Output = Self> + Send;
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stderr]   --> src/into_iterator.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stderr] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stderr]    |
[INFO] [stderr] 12 -     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stderr] 12 +     fn into_iter(self) -> impl std::future::Future<Output = Self::IntoIter> + Send;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stderr]   --> src/iter/mod.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stderr] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stderr]    |
[INFO] [stderr] 19 -     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stderr] 19 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item>> + Send;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stderr]   --> src/iter/mod.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     async fn collect<B: FromIterator<Self::Item>>(self) -> B
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stderr] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stderr]    |
[INFO] [stderr] 38 ~     fn collect<B: FromIterator<Self::Item>>(self) -> impl std::future::Future<Output = B> + Send
[INFO] [stderr] 39 |     where
[INFO] [stderr] 40 |         Self: Sized,
[INFO] [stderr] 41 ~     {async {
[INFO] [stderr] 42 |         let fut = <B as crate::FromIterator<_>>::from_iter(self);
[INFO] [stderr] 43 |         fut.await
[INFO] [stderr] 44 ~     } }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stderr]   --> src/lending_iter/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stderr] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stderr]    |
[INFO] [stderr] 11 -     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stderr] 11 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item<'_>>> + Send;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `async-iterator` (lib) generated 8 warnings
[INFO] [stderr] warning: `async-iterator` (lib test) generated 8 warnings (8 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/async_iterator-3afe65399e4eb2ce)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test::smoke ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/test.rs (/opt/rustwide/target/debug/deps/test-4643b25e3ddbaf22)
[INFO] [stderr]    Doc-tests async_iterator
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1ddde4a954d1f347b401c4e231b340bb540e55028ae2f98b072b6e3f791406dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ddde4a954d1f347b401c4e231b340bb540e55028ae2f98b072b6e3f791406dc", kill_on_drop: false }`
[INFO] [stdout] 1ddde4a954d1f347b401c4e231b340bb540e55028ae2f98b072b6e3f791406dc
[INFO] testing async-iterator-2.2.0 against try#b642703cf9526da1e72c0b6755753b939a9c6b6d for pr-125151
[INFO] extracting crate async-iterator 2.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate async-iterator 2.2.0 on toolchain b642703cf9526da1e72c0b6755753b939a9c6b6d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate async-iterator 2.2.0
[INFO] finished tweaking crates.io crate async-iterator 2.2.0
[INFO] tweaked toml for crates.io crate async-iterator 2.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b28fff141f4c78fe8959ae2f2eaa01697e6646b6a0feea566f977026d7b18411
[INFO] running `Command { std: "docker" "start" "-a" "b28fff141f4c78fe8959ae2f2eaa01697e6646b6a0feea566f977026d7b18411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b28fff141f4c78fe8959ae2f2eaa01697e6646b6a0feea566f977026d7b18411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b28fff141f4c78fe8959ae2f2eaa01697e6646b6a0feea566f977026d7b18411", kill_on_drop: false }`
[INFO] [stdout] b28fff141f4c78fe8959ae2f2eaa01697e6646b6a0feea566f977026d7b18411
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 169e8f2ee5f428971c2c2234b0c7cc5a522df7413baaac87a50bd487e36b281f
[INFO] running `Command { std: "docker" "start" "-a" "169e8f2ee5f428971c2c2234b0c7cc5a522df7413baaac87a50bd487e36b281f", kill_on_drop: false }`
[INFO] [stderr]    Compiling async-iterator v2.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `return_position_impl_trait_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | #![feature(return_position_impl_trait_in_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `async_fn_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | #![feature(async_fn_in_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]  --> src/extend.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn extend<T>(&mut self, iter: T)
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout]   = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]   |
[INFO] [stdout] 8 -     async fn extend<T>(&mut self, iter: T)
[INFO] [stdout] 8 +     fn extend<T>(&mut self, iter: T) -> impl std::future::Future<Output = ()> + Send
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]  --> src/from_iterator.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]   |
[INFO] [stdout] 8 -     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stdout] 8 +     fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> impl std::future::Future<Output = Self> + Send;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/into_iterator.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 12 -     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stdout] 12 +     fn into_iter(self) -> impl std::future::Future<Output = Self::IntoIter> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/iter/mod.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 19 -     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stdout] 19 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/iter/mod.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     async fn collect<B: FromIterator<Self::Item>>(self) -> B
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 38 ~     fn collect<B: FromIterator<Self::Item>>(self) -> impl std::future::Future<Output = B> + Send
[INFO] [stdout] 39 |     where
[INFO] [stdout] 40 |         Self: Sized,
[INFO] [stdout] 41 ~     {async {
[INFO] [stdout] 42 |         let fut = <B as crate::FromIterator<_>>::from_iter(self);
[INFO] [stdout] 43 |         fut.await
[INFO] [stdout] 44 ~     } }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/lending_iter/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 11 -     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stdout] 11 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item<'_>>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "169e8f2ee5f428971c2c2234b0c7cc5a522df7413baaac87a50bd487e36b281f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "169e8f2ee5f428971c2c2234b0c7cc5a522df7413baaac87a50bd487e36b281f", kill_on_drop: false }`
[INFO] [stdout] 169e8f2ee5f428971c2c2234b0c7cc5a522df7413baaac87a50bd487e36b281f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aef792b8f0825ffe862499b3aeaa834976ae12139108ba8f0c4ff5f17c13b8ac
[INFO] running `Command { std: "docker" "start" "-a" "aef792b8f0825ffe862499b3aeaa834976ae12139108ba8f0c4ff5f17c13b8ac", kill_on_drop: false }`
[INFO] [stdout] warning: the feature `return_position_impl_trait_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | #![feature(return_position_impl_trait_in_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `async_fn_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | #![feature(async_fn_in_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]  --> src/extend.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn extend<T>(&mut self, iter: T)
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout]   = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]   |
[INFO] [stdout] 8 -     async fn extend<T>(&mut self, iter: T)
[INFO] [stdout] 8 +     fn extend<T>(&mut self, iter: T) -> impl std::future::Future<Output = ()> + Send
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]  --> src/from_iterator.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]   |
[INFO] [stdout] 8 -     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stdout] 8 +     fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> impl std::future::Future<Output = Self> + Send;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/into_iterator.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 12 -     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stdout] 12 +     fn into_iter(self) -> impl std::future::Future<Output = Self::IntoIter> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/iter/mod.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 19 -     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stdout] 19 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/iter/mod.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     async fn collect<B: FromIterator<Self::Item>>(self) -> B
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 38 ~     fn collect<B: FromIterator<Self::Item>>(self) -> impl std::future::Future<Output = B> + Send
[INFO] [stdout] 39 |     where
[INFO] [stdout] 40 |         Self: Sized,
[INFO] [stdout] 41 ~     {async {
[INFO] [stdout] 42 |         let fut = <B as crate::FromIterator<_>>::from_iter(self);
[INFO] [stdout] 43 |         fut.await
[INFO] [stdout] 44 ~     } }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/lending_iter/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 11 -     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stdout] 11 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item<'_>>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling async-iterator v2.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `return_position_impl_trait_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | #![feature(return_position_impl_trait_in_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `async_fn_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | #![feature(async_fn_in_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]  --> src/extend.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn extend<T>(&mut self, iter: T)
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout]   = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]   |
[INFO] [stdout] 8 -     async fn extend<T>(&mut self, iter: T)
[INFO] [stdout] 8 +     fn extend<T>(&mut self, iter: T) -> impl std::future::Future<Output = ()> + Send
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]  --> src/from_iterator.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]   |
[INFO] [stdout] 8 -     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stdout] 8 +     fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> impl std::future::Future<Output = Self> + Send;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/into_iterator.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 12 -     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stdout] 12 +     fn into_iter(self) -> impl std::future::Future<Output = Self::IntoIter> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/iter/mod.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 19 -     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stdout] 19 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/iter/mod.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     async fn collect<B: FromIterator<Self::Item>>(self) -> B
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 38 ~     fn collect<B: FromIterator<Self::Item>>(self) -> impl std::future::Future<Output = B> + Send
[INFO] [stdout] 39 |     where
[INFO] [stdout] 40 |         Self: Sized,
[INFO] [stdout] 41 ~     {async {
[INFO] [stdout] 42 |         let fut = <B as crate::FromIterator<_>>::from_iter(self);
[INFO] [stdout] 43 |         fut.await
[INFO] [stdout] 44 ~     } }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> src/lending_iter/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 11 -     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stdout] 11 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item<'_>>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "aef792b8f0825ffe862499b3aeaa834976ae12139108ba8f0c4ff5f17c13b8ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aef792b8f0825ffe862499b3aeaa834976ae12139108ba8f0c4ff5f17c13b8ac", kill_on_drop: false }`
[INFO] [stdout] aef792b8f0825ffe862499b3aeaa834976ae12139108ba8f0c4ff5f17c13b8ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a02c5a7f310002ba1c13b1bfeda92fc06d64c83b8bc7777dab7873d2dcb4d89d
[INFO] running `Command { std: "docker" "start" "-a" "a02c5a7f310002ba1c13b1bfeda92fc06d64c83b8bc7777dab7873d2dcb4d89d", kill_on_drop: false }`
[INFO] [stderr] warning: the feature `return_position_impl_trait_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/lib.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 | #![feature(return_position_impl_trait_in_trait)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `async_fn_in_trait` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/lib.rs:23:12
[INFO] [stderr]    |
[INFO] [stderr] 23 | #![feature(async_fn_in_trait)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stderr]  --> src/extend.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     async fn extend<T>(&mut self, iter: T)
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stderr]   = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stderr] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stderr]   |
[INFO] [stderr] 8 -     async fn extend<T>(&mut self, iter: T)
[INFO] [stderr] 8 +     fn extend<T>(&mut self, iter: T) -> impl std::future::Future<Output = ()> + Send
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stderr]  --> src/from_iterator.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stderr] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stderr]   |
[INFO] [stderr] 8 -     async fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
[INFO] [stderr] 8 +     fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> impl std::future::Future<Output = Self> + Send;
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stderr]   --> src/into_iterator.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stderr] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stderr]    |
[INFO] [stderr] 12 -     async fn into_iter(self) -> Self::IntoIter;
[INFO] [stderr] 12 +     fn into_iter(self) -> impl std::future::Future<Output = Self::IntoIter> + Send;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stderr]   --> src/iter/mod.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stderr] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stderr]    |
[INFO] [stderr] 19 -     async fn next(&mut self) -> Option<Self::Item>;
[INFO] [stderr] 19 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item>> + Send;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stderr]   --> src/iter/mod.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     async fn collect<B: FromIterator<Self::Item>>(self) -> B
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stderr] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stderr]    |
[INFO] [stderr] 38 ~     fn collect<B: FromIterator<Self::Item>>(self) -> impl std::future::Future<Output = B> + Send
[INFO] [stderr] 39 |     where
[INFO] [stderr] 40 |         Self: Sized,
[INFO] [stderr] 41 ~     {async {
[INFO] [stderr] 42 |         let fut = <B as crate::FromIterator<_>>::from_iter(self);
[INFO] [stderr] 43 |         fut.await
[INFO] [stderr] 44 ~     } }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stderr]   --> src/lending_iter/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stderr] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stderr]    |
[INFO] [stderr] 11 -     async fn next(&mut self) -> Option<Self::Item<'_>>;
[INFO] [stderr] 11 +     fn next(&mut self) -> impl std::future::Future<Output = Option<Self::Item<'_>>> + Send;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `async-iterator` (lib) generated 8 warnings
[INFO] [stderr] warning: `async-iterator` (lib test) generated 8 warnings (8 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/async_iterator-3afe65399e4eb2ce)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]      Running tests/test.rs (/opt/rustwide/target/debug/deps/test-4643b25e3ddbaf22)
[INFO] [stdout] test test::smoke ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests async_iterator
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a02c5a7f310002ba1c13b1bfeda92fc06d64c83b8bc7777dab7873d2dcb4d89d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a02c5a7f310002ba1c13b1bfeda92fc06d64c83b8bc7777dab7873d2dcb4d89d", kill_on_drop: false }`
[INFO] [stdout] a02c5a7f310002ba1c13b1bfeda92fc06d64c83b8bc7777dab7873d2dcb4d89d
