[INFO] fetching crate embedded-packet-io 0.1.0...
[INFO] checking embedded-packet-io-0.1.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate embedded-packet-io 0.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate embedded-packet-io 0.1.0
[INFO] finished tweaking crates.io crate embedded-packet-io 0.1.0
[INFO] tweaked toml for crates.io crate embedded-packet-io 0.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate embedded-packet-io 0.1.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate embedded-packet-io 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b1ddd59e9773a73d8dcce2a3b85e51c8098d8b0f6deb4eba3b87fce7ec36aba3
[INFO] running `Command { std: "docker" "start" "-a" "b1ddd59e9773a73d8dcce2a3b85e51c8098d8b0f6deb4eba3b87fce7ec36aba3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b1ddd59e9773a73d8dcce2a3b85e51c8098d8b0f6deb4eba3b87fce7ec36aba3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1ddd59e9773a73d8dcce2a3b85e51c8098d8b0f6deb4eba3b87fce7ec36aba3", kill_on_drop: false }`
[INFO] [stdout] b1ddd59e9773a73d8dcce2a3b85e51c8098d8b0f6deb4eba3b87fce7ec36aba3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a02cd1586a18f7634fec87e33d1d16d8d950927d0d9d9ebe2aa8ae2240cc1bd9
[INFO] running `Command { std: "docker" "start" "-a" "a02cd1586a18f7634fec87e33d1d16d8d950927d0d9d9ebe2aa8ae2240cc1bd9", kill_on_drop: false }`
[INFO] [stderr]    Compiling embedded-io-async v0.6.1
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]     Checking embedded-io v0.6.1
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking hash32 v0.3.1
[INFO] [stderr]     Checking embedded-packet-io v0.1.0 (/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/lib.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn read_packet(&mut self) -> Result<heapless::Vec<u8, N>, Self::Error>;
[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 read_packet(&mut self) -> Result<heapless::Vec<u8, N>, Self::Error>;
[INFO] [stdout] 8 +     fn read_packet(&mut self) -> impl std::future::Future<Output = Result<heapless::Vec<u8, N>, Self::Error>> + 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/lib.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     async fn read_packet(&mut self) -> Result<heapless::Vec<u8, N>, Self::Error>;
[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 read_packet(&mut self) -> Result<heapless::Vec<u8, N>, Self::Error>;
[INFO] [stdout] 8 +     fn read_packet(&mut self) -> impl std::future::Future<Output = Result<heapless::Vec<u8, N>, Self::Error>> + 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/lib.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     async fn write_packet(&mut self, x: heapless::Vec<u8,N>) -> Result<(),Self::Error>;
[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] 15 -     async fn write_packet(&mut self, x: heapless::Vec<u8,N>) -> Result<(),Self::Error>;
[INFO] [stdout] 15 +     fn write_packet(&mut self, x: heapless::Vec<u8,N>) -> impl std::future::Future<Output = Result<(),Self::Error>> + 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/lib.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     async fn flush(&mut self) -> Result<(),Self::Error>;
[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] 16 -     async fn flush(&mut self) -> Result<(),Self::Error>;
[INFO] [stdout] 16 +     fn flush(&mut self) -> impl std::future::Future<Output = Result<(),Self::Error>> + 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/lib.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     async fn write_packet(&mut self, x: heapless::Vec<u8,N>) -> Result<(),Self::Error>;
[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] 15 -     async fn write_packet(&mut self, x: heapless::Vec<u8,N>) -> Result<(),Self::Error>;
[INFO] [stdout] 15 +     fn write_packet(&mut self, x: heapless::Vec<u8,N>) -> impl std::future::Future<Output = Result<(),Self::Error>> + 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/lib.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     async fn flush(&mut self) -> Result<(),Self::Error>;
[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] 16 -     async fn flush(&mut self) -> Result<(),Self::Error>;
[INFO] [stdout] 16 +     fn flush(&mut self) -> impl std::future::Future<Output = Result<(),Self::Error>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.29s
[INFO] running `Command { std: "docker" "inspect" "a02cd1586a18f7634fec87e33d1d16d8d950927d0d9d9ebe2aa8ae2240cc1bd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a02cd1586a18f7634fec87e33d1d16d8d950927d0d9d9ebe2aa8ae2240cc1bd9", kill_on_drop: false }`
[INFO] [stdout] a02cd1586a18f7634fec87e33d1d16d8d950927d0d9d9ebe2aa8ae2240cc1bd9