[INFO] fetching crate embedded-packet-io 0.1.0...
[INFO] testing embedded-packet-io-0.1.0 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_getrandom_patch_0
[INFO] extracting crate embedded-packet-io 0.1.0 into /workspace/builds/worker-3-tc1/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-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate embedded-packet-io 0.1.0 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 410d11f8883e1910dcb6386f9200f7c1d2ac7b2f2bd13572744ddfae38a66417
[INFO] running `Command { std: "docker" "start" "-a" "410d11f8883e1910dcb6386f9200f7c1d2ac7b2f2bd13572744ddfae38a66417", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "410d11f8883e1910dcb6386f9200f7c1d2ac7b2f2bd13572744ddfae38a66417", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "410d11f8883e1910dcb6386f9200f7c1d2ac7b2f2bd13572744ddfae38a66417", kill_on_drop: false }`
[INFO] [stdout] 410d11f8883e1910dcb6386f9200f7c1d2ac7b2f2bd13572744ddfae38a66417
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] bd6a6a7c2108dca7b6236b11658339de3ec3facf54d3c389589d1ab237e7578b
[INFO] running `Command { std: "docker" "start" "-a" "bd6a6a7c2108dca7b6236b11658339de3ec3facf54d3c389589d1ab237e7578b", kill_on_drop: false }`
[INFO] [stderr]    Compiling embedded-io-async v0.6.1
[INFO] [stderr]    Compiling embedded-io v0.6.1
[INFO] [stderr]    Compiling 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: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 0.61s
[INFO] running `Command { std: "docker" "inspect" "bd6a6a7c2108dca7b6236b11658339de3ec3facf54d3c389589d1ab237e7578b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd6a6a7c2108dca7b6236b11658339de3ec3facf54d3c389589d1ab237e7578b", kill_on_drop: false }`
[INFO] [stdout] bd6a6a7c2108dca7b6236b11658339de3ec3facf54d3c389589d1ab237e7578b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] b5da36b52df36b1b81fdf19cccac34858724784f96ae153aa68f5047ee09c310
[INFO] running `Command { std: "docker" "start" "-a" "b5da36b52df36b1b81fdf19cccac34858724784f96ae153aa68f5047ee09c310", kill_on_drop: false }`
[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] [stderr]    Compiling 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: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: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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "b5da36b52df36b1b81fdf19cccac34858724784f96ae153aa68f5047ee09c310", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5da36b52df36b1b81fdf19cccac34858724784f96ae153aa68f5047ee09c310", kill_on_drop: false }`
[INFO] [stdout] b5da36b52df36b1b81fdf19cccac34858724784f96ae153aa68f5047ee09c310
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 24a6e1289d3b31a9056d5f247d50307ea37bc81cc09f460ad2e40835cd5ca9c5
[INFO] running `Command { std: "docker" "start" "-a" "24a6e1289d3b31a9056d5f247d50307ea37bc81cc09f460ad2e40835cd5ca9c5", kill_on_drop: false }`
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stderr]  --> src/lib.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     async fn read_packet(&mut self) -> Result<heapless::Vec<u8, N>, Self::Error>;
[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 read_packet(&mut self) -> Result<heapless::Vec<u8, N>, Self::Error>;
[INFO] [stdout] 
[INFO] [stderr] 8 +     fn read_packet(&mut self) -> impl std::future::Future<Output = Result<heapless::Vec<u8, N>, Self::Error>> + Send;
[INFO] [stdout] running 0 tests
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout] 
[INFO] [stderr]   --> src/lib.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     async fn write_packet(&mut self, x: heapless::Vec<u8,N>) -> Result<(),Self::Error>;
[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] 15 -     async fn write_packet(&mut self, x: heapless::Vec<u8,N>) -> Result<(),Self::Error>;
[INFO] [stderr] 15 +     fn write_packet(&mut self, x: heapless::Vec<u8,N>) -> impl std::future::Future<Output = Result<(),Self::Error>> + 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/lib.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     async fn flush(&mut self) -> Result<(),Self::Error>;
[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] 16 -     async fn flush(&mut self) -> Result<(),Self::Error>;
[INFO] [stderr] 16 +     fn flush(&mut self) -> impl std::future::Future<Output = Result<(),Self::Error>> + Send;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `embedded-packet-io` (lib) generated 3 warnings
[INFO] [stderr] warning: `embedded-packet-io` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/embedded_packet_io-c5902f4663cc2a94)
[INFO] running `Command { std: "docker" "inspect" "24a6e1289d3b31a9056d5f247d50307ea37bc81cc09f460ad2e40835cd5ca9c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24a6e1289d3b31a9056d5f247d50307ea37bc81cc09f460ad2e40835cd5ca9c5", kill_on_drop: false }`
[INFO] [stdout] 24a6e1289d3b31a9056d5f247d50307ea37bc81cc09f460ad2e40835cd5ca9c5