[INFO] fetching crate beem 0.1.1...
[INFO] checking beem-0.1.1 against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] extracting crate beem 0.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate beem 0.1.1
[INFO] finished tweaking crates.io crate beem 0.1.1
[INFO] tweaked toml for crates.io crate beem 0.1.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate beem 0.1.1 on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 14 packages to latest compatible versions
[INFO] [stderr]       Adding embedded-io v0.6.1 (available: v0.7.1)
[INFO] [stderr]       Adding embedded-io-async v0.6.1 (available: v0.7.0)
[INFO] [stderr]       Adding generic-array v0.14.7 (available: v0.14.9)
[INFO] [stderr]       Adding weev v0.3.1 (available: v0.4.3)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mutex_trait2 v0.3.1
[INFO] [stderr]   Downloaded weev v0.3.1
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae04790c6f11ce8a902e5384c86d27f4a4b93afe7213bbfb4e941b684ea70776
[INFO] running `Command { std: "docker" "start" "-a" "ae04790c6f11ce8a902e5384c86d27f4a4b93afe7213bbfb4e941b684ea70776", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae04790c6f11ce8a902e5384c86d27f4a4b93afe7213bbfb4e941b684ea70776", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae04790c6f11ce8a902e5384c86d27f4a4b93afe7213bbfb4e941b684ea70776", kill_on_drop: false }`
[INFO] [stdout] ae04790c6f11ce8a902e5384c86d27f4a4b93afe7213bbfb4e941b684ea70776
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1329bce3a0a426bfc0427161b9721468f63414d50a157c214ebfa75c047d79d
[INFO] running `Command { std: "docker" "start" "-a" "f1329bce3a0a426bfc0427161b9721468f63414d50a157c214ebfa75c047d79d", kill_on_drop: false }`
[INFO] [stderr]     Checking embedded-io v0.6.1
[INFO] [stderr]     Checking mutex_trait2 v0.3.1
[INFO] [stderr]    Compiling embedded-io-async v0.6.1
[INFO] [stderr]     Checking crypto-common v0.1.7
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha3 v0.10.8
[INFO] [stderr]     Checking weev v0.3.1
[INFO] [stderr]     Checking beem v0.1.1 (/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:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     async fn accept(&mut self, seed: &[u8]) -> Result<Self,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] 12 -     async fn accept(&mut self, seed: &[u8]) -> Result<Self,Self::Error>;
[INFO] [stdout] 12 +     fn accept(&mut self, seed: &[u8]) -> impl std::future::Future<Output = Result<Self,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:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     async fn offer(&mut self) -> Result<Self,ReadExactError<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] 13 -     async fn offer(&mut self) -> Result<Self,ReadExactError<Self::Error>>;
[INFO] [stdout] 13 +     fn offer(&mut self) -> impl std::future::Future<Output = Result<Self,ReadExactError<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:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     async fn accept(&mut self, seed: &[u8]) -> Result<Self,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] 12 -     async fn accept(&mut self, seed: &[u8]) -> Result<Self,Self::Error>;
[INFO] [stdout] 12 +     fn accept(&mut self, seed: &[u8]) -> impl std::future::Future<Output = Result<Self,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:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     async fn offer(&mut self) -> Result<Self,ReadExactError<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] 13 -     async fn offer(&mut self) -> Result<Self,ReadExactError<Self::Error>>;
[INFO] [stdout] 13 +     fn offer(&mut self) -> impl std::future::Future<Output = Result<Self,ReadExactError<Self::Error>>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `Command { std: "docker" "inspect" "f1329bce3a0a426bfc0427161b9721468f63414d50a157c214ebfa75c047d79d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1329bce3a0a426bfc0427161b9721468f63414d50a157c214ebfa75c047d79d", kill_on_drop: false }`
[INFO] [stdout] f1329bce3a0a426bfc0427161b9721468f63414d50a157c214ebfa75c047d79d