[INFO] fetching crate dewit 0.0.1...
[INFO] checking dewit-0.0.1 against 1.95.0 for pr-155915
[INFO] extracting crate dewit 0.0.1 into /workspace/builds/worker-2-tc1/source
[INFO] removed /workspace/builds/worker-2-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate dewit 0.0.1
[INFO] finished tweaking crates.io crate dewit 0.0.1
[INFO] tweaked toml for crates.io crate dewit 0.0.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate dewit 0.0.1 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate dewit 0.0.1 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 32ec70fcdb70411bdfcb3f0560879ac95c41eee77b8b2b556e1d013e0d7e06f5
[INFO] running `Command { std: "docker" "start" "-a" "32ec70fcdb70411bdfcb3f0560879ac95c41eee77b8b2b556e1d013e0d7e06f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32ec70fcdb70411bdfcb3f0560879ac95c41eee77b8b2b556e1d013e0d7e06f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32ec70fcdb70411bdfcb3f0560879ac95c41eee77b8b2b556e1d013e0d7e06f5", kill_on_drop: false }`
[INFO] [stdout] 32ec70fcdb70411bdfcb3f0560879ac95c41eee77b8b2b556e1d013e0d7e06f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8f5fe0449f36d038d38915e67602e46a4fef9fc2b1e75fc407d982c61599c63
[INFO] running `Command { std: "docker" "start" "-a" "e8f5fe0449f36d038d38915e67602e46a4fef9fc2b1e75fc407d982c61599c63", kill_on_drop: false }`
[INFO] [stderr]     Checking mio v1.1.0
[INFO] [stderr]     Checking socket2 v0.6.1
[INFO] [stderr]     Checking pollster v0.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking parking_lot_core v0.9.12
[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking dewit v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(future_join)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mode`
[INFO] [stdout]    --> src/combinators/map.rs:130:20
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn go<M>(self, mode: &'src M, input: I) -> TaskOutput<'src, M, IBO>
[INFO] [stdout]     |                    ^^^^ help: if this is intentional, prefix it with an underscore: `_mode`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]    --> src/combinators/map.rs:130:35
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn go<M>(self, mode: &'src M, input: I) -> TaskOutput<'src, M, IBO>
[INFO] [stdout]     |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dewit` (lib) due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e8f5fe0449f36d038d38915e67602e46a4fef9fc2b1e75fc407d982c61599c63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8f5fe0449f36d038d38915e67602e46a4fef9fc2b1e75fc407d982c61599c63", kill_on_drop: false }`
[INFO] [stdout] e8f5fe0449f36d038d38915e67602e46a4fef9fc2b1e75fc407d982c61599c63
