[INFO] cloning repository https://github.com/luctius/hd44780_menu
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/luctius/hd44780_menu" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluctius%2Fhd44780_menu", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluctius%2Fhd44780_menu'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5ab9d396991586b337999d8a96b127c7fa42b1ca
[INFO] checking luctius/hd44780_menu against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluctius%2Fhd44780_menu" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/luctius/hd44780_menu on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/luctius/hd44780_menu
[INFO] finished tweaking git repo https://github.com/luctius/hd44780_menu
[INFO] tweaked toml for git repo https://github.com/luctius/hd44780_menu written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/luctius/hd44780_menu already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 55513e69b7713d4f2745d95c29575c24d118bdfa916a97728817471e6e600b5e
[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" "55513e69b7713d4f2745d95c29575c24d118bdfa916a97728817471e6e600b5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55513e69b7713d4f2745d95c29575c24d118bdfa916a97728817471e6e600b5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55513e69b7713d4f2745d95c29575c24d118bdfa916a97728817471e6e600b5e", kill_on_drop: false }`
[INFO] [stdout] 55513e69b7713d4f2745d95c29575c24d118bdfa916a97728817471e6e600b5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09d535a3dac9bc8c4921c9c24ed42f8ad5185d58898cf57ed2e7e7e4bf2d8f1a
[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" "09d535a3dac9bc8c4921c9c24ed42f8ad5185d58898cf57ed2e7e7e4bf2d8f1a", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling heapless v0.5.1
[INFO] [stderr]     Checking nb v0.1.2
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking embedded-hal v0.2.3
[INFO] [stderr]     Checking hd44780-driver v0.3.0 (https://github.com/luctius/hd44780-driver.git?branch=master#b0e9b10d)
[INFO] [stderr]     Checking as-slice v0.1.0
[INFO] [stderr]     Checking hash32 v0.1.0
[INFO] [stderr]     Checking hd44780-menu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `consts::U18`
[INFO] [stdout]   --> src/lib.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     consts::U18,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `consts::U18`
[INFO] [stdout]   --> src/lib.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     consts::U18,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `max_idx` is assigned to, but never used
[INFO] [stdout]    --> src/lib.rs:391:29
[INFO] [stdout]     |
[INFO] [stdout] 391 |                         let mut max_idx = 0;
[INFO] [stdout]     |                             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]     = note: consider using `_max_idx` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `max_idx` is never read
[INFO] [stdout]    --> src/lib.rs:398:29
[INFO] [stdout]     |
[INFO] [stdout] 398 | ...                   max_idx = r;
[INFO] [stdout]     |                       ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:260:39
[INFO] [stdout]     |
[INFO] [stdout] 260 |             MenuState::BrowseMenus(r, mut idx) => {
[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: variable `max_idx` is assigned to, but never used
[INFO] [stdout]    --> src/lib.rs:391:29
[INFO] [stdout]     |
[INFO] [stdout] 391 |                         let mut max_idx = 0;
[INFO] [stdout]     |                             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]     = note: consider using `_max_idx` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `max_idx` is never read
[INFO] [stdout]    --> src/lib.rs:398:29
[INFO] [stdout]     |
[INFO] [stdout] 398 | ...                   max_idx = r;
[INFO] [stdout]     |                       ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:260:39
[INFO] [stdout]     |
[INFO] [stdout] 260 |             MenuState::BrowseMenus(r, mut idx) => {
[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: 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 3.70s
[INFO] running `Command { std: "docker" "inspect" "09d535a3dac9bc8c4921c9c24ed42f8ad5185d58898cf57ed2e7e7e4bf2d8f1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09d535a3dac9bc8c4921c9c24ed42f8ad5185d58898cf57ed2e7e7e4bf2d8f1a", kill_on_drop: false }`
[INFO] [stdout] 09d535a3dac9bc8c4921c9c24ed42f8ad5185d58898cf57ed2e7e7e4bf2d8f1a