[INFO] cloning repository https://github.com/Acorn-OS/kernel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Acorn-OS/kernel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAcorn-OS%2Fkernel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAcorn-OS%2Fkernel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf4bf9af7ee93cd075643e0159f1f08467c4a7c5
[INFO] checking Acorn-OS/kernel against master#180dffba142c47240ca0d93096ce90b9fd97c8d7 for pr-114716
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAcorn-OS%2Fkernel" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Acorn-OS/kernel on toolchain 180dffba142c47240ca0d93096ce90b9fd97c8d7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+180dffba142c47240ca0d93096ce90b9fd97c8d7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc1/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-4-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/Acorn-OS/kernel
[INFO] finished tweaking git repo https://github.com/Acorn-OS/kernel
[INFO] tweaked toml for git repo https://github.com/Acorn-OS/kernel written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Acorn-OS/kernel 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" "+180dffba142c47240ca0d93096ce90b9fd97c8d7" "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@sha256:84cb280c7acaf12c1f874411053406050a24f846e52f817d4d9e64bcbe5ce959" "/opt/rustwide/cargo-home/bin/cargo" "+180dffba142c47240ca0d93096ce90b9fd97c8d7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fea2a1c51860988ae99758d6bef4c44676387fe34983ec4bdd8f975abff94d59
[INFO] running `Command { std: "docker" "start" "-a" "fea2a1c51860988ae99758d6bef4c44676387fe34983ec4bdd8f975abff94d59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fea2a1c51860988ae99758d6bef4c44676387fe34983ec4bdd8f975abff94d59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fea2a1c51860988ae99758d6bef4c44676387fe34983ec4bdd8f975abff94d59", kill_on_drop: false }`
[INFO] [stdout] fea2a1c51860988ae99758d6bef4c44676387fe34983ec4bdd8f975abff94d59
[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@sha256:84cb280c7acaf12c1f874411053406050a24f846e52f817d4d9e64bcbe5ce959" "/opt/rustwide/cargo-home/bin/cargo" "+180dffba142c47240ca0d93096ce90b9fd97c8d7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 619b96582eeaccabbbc0b70806a992a25e1449e9844c56d26bc8ad776af3943d
[INFO] running `Command { std: "docker" "start" "-a" "619b96582eeaccabbbc0b70806a992a25e1449e9844c56d26bc8ad776af3943d", kill_on_drop: false }`
[INFO] [stderr]     Checking acorn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> acorn_build.rs:179:17
[INFO] [stdout]     |
[INFO] [stdout] 179 |             file.clone(),
[INFO] [stdout]     |                 ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Path` does not implement `Clone`, so calling `clone` on `&Path` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> acorn_build.rs:179:17
[INFO] [stdout]     |
[INFO] [stdout] 179 |             file.clone(),
[INFO] [stdout]     |                 ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Path` does not implement `Clone`, so calling `clone` on `&Path` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "619b96582eeaccabbbc0b70806a992a25e1449e9844c56d26bc8ad776af3943d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "619b96582eeaccabbbc0b70806a992a25e1449e9844c56d26bc8ad776af3943d", kill_on_drop: false }`
[INFO] [stdout] 619b96582eeaccabbbc0b70806a992a25e1449e9844c56d26bc8ad776af3943d