[INFO] cloning repository https://github.com/robertmaloney/advent2017
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/robertmaloney/advent2017" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobertmaloney%2Fadvent2017", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobertmaloney%2Fadvent2017'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 180761b70ebc080de44760d929554b0056d36220
[INFO] checking robertmaloney/advent2017 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobertmaloney%2Fadvent2017" "/workspace/builds/worker-58/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-58/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/robertmaloney/advent2017 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/robertmaloney/advent2017
[INFO] finished tweaking git repo https://github.com/robertmaloney/advent2017
[INFO] tweaked toml for git repo https://github.com/robertmaloney/advent2017 written to /workspace/builds/worker-58/source/Cargo.toml
[INFO] crate git repo https://github.com/robertmaloney/advent2017 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5882f75e47adb7d5c46d6f902a9237960db109efdbb45fc317581c657d36ca74
[INFO] running `Command { std: "docker" "start" "-a" "5882f75e47adb7d5c46d6f902a9237960db109efdbb45fc317581c657d36ca74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5882f75e47adb7d5c46d6f902a9237960db109efdbb45fc317581c657d36ca74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5882f75e47adb7d5c46d6f902a9237960db109efdbb45fc317581c657d36ca74", kill_on_drop: false }`
[INFO] [stdout] 5882f75e47adb7d5c46d6f902a9237960db109efdbb45fc317581c657d36ca74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d45e2ddfb2e9b34e597f93df49de7e6de867a1734c3dd3f797def7e2f28ce19
[INFO] running `Command { std: "docker" "start" "-a" "3d45e2ddfb2e9b34e597f93df49de7e6de867a1734c3dd3f797def7e2f28ce19", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking advent2017 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> src/util/mod.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 |   let f = try!(File::open(file_path));
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> src/util/mod.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 |   let f = try!(File::open(file_path));
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `max_min_difference`
[INFO] [stdout]  --> src/day_two/mod.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn max_min_difference<T: Iterator<Item=u32>>(iter: T) -> u32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]  --> src/day_three/mod.rs:6:3
[INFO] [stdout]   |
[INFO] [stdout] 6 |   value: i32,
[INFO] [stdout]   |   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `max_min_difference`
[INFO] [stdout]  --> src/day_two/mod.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn max_min_difference<T: Iterator<Item=u32>>(iter: T) -> u32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]  --> src/day_three/mod.rs:6:3
[INFO] [stdout]   |
[INFO] [stdout] 6 |   value: i32,
[INFO] [stdout]   |   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/util/mod.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 11 |   reader.read_to_string(&mut buffer);
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/util/mod.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 11 |   reader.read_to_string(&mut buffer);
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.00s
[INFO] running `Command { std: "docker" "inspect" "3d45e2ddfb2e9b34e597f93df49de7e6de867a1734c3dd3f797def7e2f28ce19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d45e2ddfb2e9b34e597f93df49de7e6de867a1734c3dd3f797def7e2f28ce19", kill_on_drop: false }`
[INFO] [stdout] 3d45e2ddfb2e9b34e597f93df49de7e6de867a1734c3dd3f797def7e2f28ce19