[INFO] cloning repository https://github.com/petr-tik/dark_rusty_pool
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/petr-tik/dark_rusty_pool" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpetr-tik%2Fdark_rusty_pool", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpetr-tik%2Fdark_rusty_pool'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 42eb176a78636a67ab1b37c47433f74d05612d22
[INFO] checking petr-tik/dark_rusty_pool against try#05c8870159e4f328578a970e125aa76d24f03b56 for pr-76219
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpetr-tik%2Fdark_rusty_pool" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/petr-tik/dark_rusty_pool on toolchain 05c8870159e4f328578a970e125aa76d24f03b56
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/petr-tik/dark_rusty_pool
[INFO] finished tweaking git repo https://github.com/petr-tik/dark_rusty_pool
[INFO] tweaked toml for git repo https://github.com/petr-tik/dark_rusty_pool written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/petr-tik/dark_rusty_pool already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8543e6c7f793a58b1d65eeb608b75d823ce9bb9763398b3939fb1de6c0853370
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8543e6c7f793a58b1d65eeb608b75d823ce9bb9763398b3939fb1de6c0853370", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8543e6c7f793a58b1d65eeb608b75d823ce9bb9763398b3939fb1de6c0853370", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8543e6c7f793a58b1d65eeb608b75d823ce9bb9763398b3939fb1de6c0853370", kill_on_drop: false }`
[INFO] [stdout] 8543e6c7f793a58b1d65eeb608b75d823ce9bb9763398b3939fb1de6c0853370
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 76b7ef88fee3aae401442f7f4444ccb0396f0df5952ff6a5d50e52ef5df2ab76
[INFO] running `Command { std: "docker" "start" "-a" "76b7ef88fee3aae401442f7f4444ccb0396f0df5952ff6a5d50e52ef5df2ab76", kill_on_drop: false }`
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking order_book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let mut prev = reports.get_mut(&!ob.last_action_side).unwrap();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let mut prev = reports.get_mut(&!ob.last_action_side).unwrap();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `Command { std: "docker" "inspect" "76b7ef88fee3aae401442f7f4444ccb0396f0df5952ff6a5d50e52ef5df2ab76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76b7ef88fee3aae401442f7f4444ccb0396f0df5952ff6a5d50e52ef5df2ab76", kill_on_drop: false }`
[INFO] [stdout] 76b7ef88fee3aae401442f7f4444ccb0396f0df5952ff6a5d50e52ef5df2ab76