[INFO] fetching crate async-iterator 2.2.0...
[INFO] checking async-iterator-2.2.0 against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[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 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "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" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "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" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0845a3bdd4103e7faa49ada729b560eead54b563bf1cfba322dbf66eacc08f9
[INFO] running `Command { std: "docker" "start" "-a" "c0845a3bdd4103e7faa49ada729b560eead54b563bf1cfba322dbf66eacc08f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0845a3bdd4103e7faa49ada729b560eead54b563bf1cfba322dbf66eacc08f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0845a3bdd4103e7faa49ada729b560eead54b563bf1cfba322dbf66eacc08f9", kill_on_drop: false }`
[INFO] [stdout] c0845a3bdd4103e7faa49ada729b560eead54b563bf1cfba322dbf66eacc08f9
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 803239587a0cdd678eb2f5ecb052bc55ac47d5469b36afc6aa40b1eba51afc71
[INFO] running `Command { std: "docker" "start" "-a" "803239587a0cdd678eb2f5ecb052bc55ac47d5469b36afc6aa40b1eba51afc71", kill_on_drop: false }`
[INFO] [stderr]     Checking 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: 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: 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] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "803239587a0cdd678eb2f5ecb052bc55ac47d5469b36afc6aa40b1eba51afc71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "803239587a0cdd678eb2f5ecb052bc55ac47d5469b36afc6aa40b1eba51afc71", kill_on_drop: false }`
[INFO] [stdout] 803239587a0cdd678eb2f5ecb052bc55ac47d5469b36afc6aa40b1eba51afc71
