[INFO] cloning repository https://github.com/hone/rust-buildpack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hone/rust-buildpack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhone%2Frust-buildpack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhone%2Frust-buildpack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1e64610c680270db0651773e53dcfad73c851ed4
[INFO] documenting hone/rust-buildpack against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhone%2Frust-buildpack" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hone/rust-buildpack on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hone/rust-buildpack
[INFO] finished tweaking git repo https://github.com/hone/rust-buildpack
[INFO] tweaked toml for git repo https://github.com/hone/rust-buildpack written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/hone/rust-buildpack already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 67fa57151498b83d11b66b5c18c08cc57734f2b0928bd7e2dff8a7db938b093a
[INFO] running `Command { std: "docker" "start" "-a" "67fa57151498b83d11b66b5c18c08cc57734f2b0928bd7e2dff8a7db938b093a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67fa57151498b83d11b66b5c18c08cc57734f2b0928bd7e2dff8a7db938b093a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67fa57151498b83d11b66b5c18c08cc57734f2b0928bd7e2dff8a7db938b093a", kill_on_drop: false }`
[INFO] [stdout] 67fa57151498b83d11b66b5c18c08cc57734f2b0928bd7e2dff8a7db938b093a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "RUSTDOCFLAGS=--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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] be77ec9e34c773cea5ec698a5dc3b9896d35e95d252cf02b43b700b0953ed88f
[INFO] running `Command { std: "docker" "start" "-a" "be77ec9e34c773cea5ec698a5dc3b9896d35e95d252cf02b43b700b0953ed88f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling anyhow v1.0.34
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]     Checking serde v1.0.117
[INFO] [stderr]     Checking toml v0.5.7
[INFO] [stderr]     Checking libcnb-rs v0.1.0 (/opt/rustwide/workdir/libcnb-rs)
[INFO] [stderr]  Documenting libcnb-rs v0.1.0 (/opt/rustwide/workdir/libcnb-rs)
[INFO] [stdout] warning: field is never read: `buildpack_plan_path`
[INFO] [stdout]  --> libcnb-rs/src/build.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     buildpack_plan_path: PathBuf,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `layers_path`
[INFO] [stdout]   --> libcnb-rs/src/build.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     layers_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]  Documenting cargo-buildpack v0.1.0 (/opt/rustwide/workdir/buildpacks/cargo-buildpack)
[INFO] [stderr]  Documenting rustup-buildpack v0.1.0 (/opt/rustwide/workdir/buildpacks/rustup-buildpack)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.04s
[INFO] running `Command { std: "docker" "inspect" "be77ec9e34c773cea5ec698a5dc3b9896d35e95d252cf02b43b700b0953ed88f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be77ec9e34c773cea5ec698a5dc3b9896d35e95d252cf02b43b700b0953ed88f", kill_on_drop: false }`
[INFO] [stdout] be77ec9e34c773cea5ec698a5dc3b9896d35e95d252cf02b43b700b0953ed88f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=1" "-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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b1ef38fda2c0c7fc24ab27651064986f24aa200bdcbaafc5b8bb91e752db8a45
[INFO] running `Command { std: "docker" "start" "-a" "b1ef38fda2c0c7fc24ab27651064986f24aa200bdcbaafc5b8bb91e752db8a45", kill_on_drop: false }`
[INFO] [stderr] error: manifest path `/opt/rustwide/workdir/Cargo.toml` is a virtual manifest, but this command requires running against an actual package in this workspace
[INFO] running `Command { std: "docker" "inspect" "b1ef38fda2c0c7fc24ab27651064986f24aa200bdcbaafc5b8bb91e752db8a45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1ef38fda2c0c7fc24ab27651064986f24aa200bdcbaafc5b8bb91e752db8a45", kill_on_drop: false }`
[INFO] [stdout] b1ef38fda2c0c7fc24ab27651064986f24aa200bdcbaafc5b8bb91e752db8a45