[INFO] cloning repository https://github.com/FredericHeem/rust-by-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FredericHeem/rust-by-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFredericHeem%2Frust-by-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFredericHeem%2Frust-by-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5ba1425ab145779f67b9ef2474e867945577c80b
[INFO] testing FredericHeem/rust-by-example against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFredericHeem%2Frust-by-example" "/workspace/builds/worker-32/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-32/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FredericHeem/rust-by-example on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/FredericHeem/rust-by-example
[INFO] finished tweaking git repo https://github.com/FredericHeem/rust-by-example
[INFO] tweaked toml for git repo https://github.com/FredericHeem/rust-by-example written to /workspace/builds/worker-32/source/Cargo.toml
[INFO] crate git repo https://github.com/FredericHeem/rust-by-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--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-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e1aeaa27c9f1d9d7e9f64aff7b8a5823e2610a270ff230e40fc40933f407ea4e
[INFO] running `Command { std: "docker" "start" "-a" "e1aeaa27c9f1d9d7e9f64aff7b8a5823e2610a270ff230e40fc40933f407ea4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e1aeaa27c9f1d9d7e9f64aff7b8a5823e2610a270ff230e40fc40933f407ea4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1aeaa27c9f1d9d7e9f64aff7b8a5823e2610a270ff230e40fc40933f407ea4e", kill_on_drop: false }`
[INFO] [stdout] e1aeaa27c9f1d9d7e9f64aff7b8a5823e2610a270ff230e40fc40933f407ea4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 172f16caf471e236a8623fe1d5294ef2c78515b2e34ceb30e9fc879316e0bfa7
[INFO] running `Command { std: "docker" "start" "-a" "172f16caf471e236a8623fe1d5294ef2c78515b2e34ceb30e9fc879316e0bfa7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.23
[INFO] [stderr]    Compiling num-traits v0.1.37
[INFO] [stderr]    Compiling rayon-core v1.0.2
[INFO] [stderr]    Compiling deque v0.3.2
[INFO] [stderr]    Compiling lazy_static v0.2.8
[INFO] [stderr]    Compiling num_cpus v1.5.0
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling time v0.1.37
[INFO] [stderr]    Compiling num-integer v0.1.34
[INFO] [stderr]    Compiling num-iter v0.1.33
[INFO] [stderr]    Compiling rayon v0.7.1
[INFO] [stderr]    Compiling num v0.1.37
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling rust-by-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]   --> src/tree.rs:58:18
[INFO] [stdout]    |
[INFO] [stdout] 58 |             Some(root) => println!("has root"),
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `key_pair` as mutable, as it is a captured variable in a `Fn` closure
[INFO] [stdout]   --> src/parallel.rs:16:59
[INFO] [stdout]    |
[INFO] [stdout] 16 |     passwords.par_iter().find_any(|&&x| check_password(x, &mut key_pair));
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-by-example`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "172f16caf471e236a8623fe1d5294ef2c78515b2e34ceb30e9fc879316e0bfa7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "172f16caf471e236a8623fe1d5294ef2c78515b2e34ceb30e9fc879316e0bfa7", kill_on_drop: false }`
[INFO] [stdout] 172f16caf471e236a8623fe1d5294ef2c78515b2e34ceb30e9fc879316e0bfa7
