[INFO] cloning repository https://github.com/a-rust-coder/os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/a-rust-coder/os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fa-rust-coder%2Fos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fa-rust-coder%2Fos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 17d77d11b8d87d387f8863fdc34c536ff8205942
[INFO] checking a-rust-coder/os against master#507271bc119683008ec719ecee48814e8ac86c65 for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fa-rust-coder%2Fos" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/a-rust-coder/os
[INFO] finished tweaking git repo https://github.com/a-rust-coder/os
[INFO] tweaked toml for git repo https://github.com/a-rust-coder/os written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/a-rust-coder/os on toolchain 507271bc119683008ec719ecee48814e8ac86c65
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/a-rust-coder/os 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" "+507271bc119683008ec719ecee48814e8ac86c65" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9e6f5fcaa66d92de0d8b806211aab545aff97b8ef749c41886187273fba5a4a1
[INFO] running `Command { std: "docker" "start" "-a" "9e6f5fcaa66d92de0d8b806211aab545aff97b8ef749c41886187273fba5a4a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e6f5fcaa66d92de0d8b806211aab545aff97b8ef749c41886187273fba5a4a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e6f5fcaa66d92de0d8b806211aab545aff97b8ef749c41886187273fba5a4a1", kill_on_drop: false }`
[INFO] [stdout] 9e6f5fcaa66d92de0d8b806211aab545aff97b8ef749c41886187273fba5a4a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+507271bc119683008ec719ecee48814e8ac86c65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9366eae781b30db33ef9606ff2d140f9f01a7764aa474e42c228378a01661fdb
[INFO] running `Command { std: "docker" "start" "-a" "9366eae781b30db33ef9606ff2d140f9f01a7764aa474e42c228378a01661fdb", kill_on_drop: false }`
[INFO] [stderr]     Checking mutex v0.1.0 (/opt/rustwide/workdir/libs/mutex)
[INFO] [stderr]     Checking time-units v0.1.0 (/opt/rustwide/workdir/libs/time-units)
[INFO] [stderr]     Checking partfs v0.1.0 (/opt/rustwide/workdir/libs/partfs)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> libs/partfs/src/filesystems/fat/mod.rs:88:13
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let mut dir = root_dir;
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dir_entry_raw`
[INFO] [stdout]    --> libs/partfs/src/filesystems/fat/mod.rs:101:17
[INFO] [stdout]     |
[INFO] [stdout] 101 |             let dir_entry_raw = DirEntryRaw::from(entry);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dir_entry_raw`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> libs/partfs/src/filesystems/fat/mod.rs:88:13
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let mut dir = root_dir;
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dir_entry_raw`
[INFO] [stdout]    --> libs/partfs/src/filesystems/fat/mod.rs:101:17
[INFO] [stdout]     |
[INFO] [stdout] 101 |             let dir_entry_raw = DirEntryRaw::from(entry);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dir_entry_raw`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `Command { std: "docker" "inspect" "9366eae781b30db33ef9606ff2d140f9f01a7764aa474e42c228378a01661fdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9366eae781b30db33ef9606ff2d140f9f01a7764aa474e42c228378a01661fdb", kill_on_drop: false }`
[INFO] [stdout] 9366eae781b30db33ef9606ff2d140f9f01a7764aa474e42c228378a01661fdb
