[INFO] fetching crate simple_spawner 0.3.0-alpha.17...
[INFO] checking simple_spawner-0.3.0-alpha.17 against 52995a223f2919dd3e2e427231db90a257350ded for pr-129249-4
[INFO] extracting crate simple_spawner 0.3.0-alpha.17 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate simple_spawner 0.3.0-alpha.17
[INFO] finished tweaking crates.io crate simple_spawner 0.3.0-alpha.17
[INFO] tweaked toml for crates.io crate simple_spawner 0.3.0-alpha.17 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate simple_spawner 0.3.0-alpha.17 on toolchain 52995a223f2919dd3e2e427231db90a257350ded
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "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" "+52995a223f2919dd3e2e427231db90a257350ded" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 13 packages to highest compatible versions
[INFO] [stderr]       Adding futures-channel-preview v0.3.0-alpha.17 (available: v0.3.0-alpha.19)
[INFO] [stderr]       Adding futures-core-preview v0.3.0-alpha.17 (available: v0.3.0-alpha.19)
[INFO] [stderr]       Adding futures-executor-preview v0.3.0-alpha.17 (available: v0.3.0-alpha.19)
[INFO] [stderr]       Adding futures-io-preview v0.3.0-alpha.17 (available: v0.3.0-alpha.19)
[INFO] [stderr]       Adding futures-preview v0.3.0-alpha.17 (available: v0.3.0-alpha.19)
[INFO] [stderr]       Adding futures-sink-preview v0.3.0-alpha.17 (available: v0.3.0-alpha.19)
[INFO] [stderr]       Adding futures-util-preview v0.3.0-alpha.17 (available: v0.3.0-alpha.19)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.homepage` is redundant with `package.repository`
[INFO] [stderr]   --> Cargo.toml:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 | homepage = "https://github.com/matter-labs/simple_spawner"
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 22 | repository = "https://github.com/matter-labs/simple_spawner"
[INFO] [stderr]    |              -----------------------------------------------
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::redundant_homepage` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.homepage`
[INFO] [stderr] warning: `simple_spawner` (manifest) generated 1 warning
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:c0af3998e971868164375a7dfb646c9933ddd1a3bdb00fa2041266763dc1eeab" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] cf7d8f2b1ea9b06ee6768fc5c6bbb1215da3307d3da853e2da453f67ed96af2c
[INFO] running `Command { std: "docker" "start" "cf7d8f2b1ea9b06ee6768fc5c6bbb1215da3307d3da853e2da453f67ed96af2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf7d8f2b1ea9b06ee6768fc5c6bbb1215da3307d3da853e2da453f67ed96af2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "cf7d8f2b1ea9b06ee6768fc5c6bbb1215da3307d3da853e2da453f67ed96af2c" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf7d8f2b1ea9b06ee6768fc5c6bbb1215da3307d3da853e2da453f67ed96af2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "cf7d8f2b1ea9b06ee6768fc5c6bbb1215da3307d3da853e2da453f67ed96af2c" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: `package.homepage` is redundant with `package.repository`
[INFO] [stderr]   --> Cargo.toml:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 | homepage = "https://github.com/matter-labs/simple_spawner"
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 22 | repository = "https://github.com/matter-labs/simple_spawner"
[INFO] [stderr]    |              -----------------------------------------------
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::redundant_homepage` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.homepage`
[INFO] [stderr] warning: `simple_spawner` (manifest) generated 1 warning
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking pin-utils v0.1.1
[INFO] [stderr]     Checking num_cpus v1.17.0
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking simple_spawner v0.3.0-alpha.17 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `AssertSendSync` is never used
[INFO] [stdout]   --> src/cpu_pool.rs:36:7
[INFO] [stdout]    |
[INFO] [stdout] 36 | trait AssertSendSync: Send + Sync {}
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `Result<T, E>`
[INFO] [stdout]    --> src/cpu_pool.rs:128:51
[INFO] [stdout]     |
[INFO] [stdout] 128 |             Poll::Ready(Ok(Ok(e))) => Poll::Ready(e.into()),
[INFO] [stdout]     |                                                   ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 128 -             Poll::Ready(Ok(Ok(e))) => Poll::Ready(e.into()),
[INFO] [stdout] 128 +             Poll::Ready(Ok(Ok(e))) => Poll::Ready(e),
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 128 -             Poll::Ready(Ok(Ok(e))) => Poll::Ready(e.into()),
[INFO] [stdout] 128 +             Poll::Ready(Ok(Ok(e))) => Poll::Ready(<Result<T, E> as Into<_>>::into(e)),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `simple_spawner` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: trait `AssertSendSync` is never used
[INFO] [stdout]   --> src/cpu_pool.rs:36:7
[INFO] [stdout]    |
[INFO] [stdout] 36 | trait AssertSendSync: Send + Sync {}
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `Result<T, E>`
[INFO] [stdout]    --> src/cpu_pool.rs:128:51
[INFO] [stdout]     |
[INFO] [stdout] 128 |             Poll::Ready(Ok(Ok(e))) => Poll::Ready(e.into()),
[INFO] [stdout]     |                                                   ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 128 -             Poll::Ready(Ok(Ok(e))) => Poll::Ready(e.into()),
[INFO] [stdout] 128 +             Poll::Ready(Ok(Ok(e))) => Poll::Ready(e),
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 128 -             Poll::Ready(Ok(Ok(e))) => Poll::Ready(e.into()),
[INFO] [stdout] 128 +             Poll::Ready(Ok(Ok(e))) => Poll::Ready(<Result<T, E> as Into<_>>::into(e)),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `simple_spawner` (lib test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "cf7d8f2b1ea9b06ee6768fc5c6bbb1215da3307d3da853e2da453f67ed96af2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf7d8f2b1ea9b06ee6768fc5c6bbb1215da3307d3da853e2da453f67ed96af2c", kill_on_drop: false }`
[INFO] [stdout] cf7d8f2b1ea9b06ee6768fc5c6bbb1215da3307d3da853e2da453f67ed96af2c
