[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] testing hone/rust-buildpack against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhone%2Frust-buildpack" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hone/rust-buildpack on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "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-8/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" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v1.0.53
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ebd9521b5ccc2282a71b659532343134a13c6f7a5668f9d917ba576bc7c68fe3
[INFO] running `Command { std: "docker" "start" "-a" "ebd9521b5ccc2282a71b659532343134a13c6f7a5668f9d917ba576bc7c68fe3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ebd9521b5ccc2282a71b659532343134a13c6f7a5668f9d917ba576bc7c68fe3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebd9521b5ccc2282a71b659532343134a13c6f7a5668f9d917ba576bc7c68fe3", kill_on_drop: false }`
[INFO] [stdout] ebd9521b5ccc2282a71b659532343134a13c6f7a5668f9d917ba576bc7c68fe3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a7e88083485b0ab5b71bdb17b4184c4999f3273dfbe7279189bd5a733562793
[INFO] running `Command { std: "docker" "start" "-a" "7a7e88083485b0ab5b71bdb17b4184c4999f3273dfbe7279189bd5a733562793", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling anyhow v1.0.34
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]    Compiling thiserror v1.0.22
[INFO] [stderr]    Compiling toml v0.5.7
[INFO] [stderr]    Compiling 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]    Compiling rustup-buildpack v0.1.0 (/opt/rustwide/workdir/buildpacks/rustup-buildpack)
[INFO] [stderr]    Compiling cargo-buildpack v0.1.0 (/opt/rustwide/workdir/buildpacks/cargo-buildpack)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> buildpacks/rustup-buildpack/src/bin/builder.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Build::from_args(std::env::args());
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.53s
[INFO] running `Command { std: "docker" "inspect" "7a7e88083485b0ab5b71bdb17b4184c4999f3273dfbe7279189bd5a733562793", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a7e88083485b0ab5b71bdb17b4184c4999f3273dfbe7279189bd5a733562793", kill_on_drop: false }`
[INFO] [stdout] 7a7e88083485b0ab5b71bdb17b4184c4999f3273dfbe7279189bd5a733562793
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 811eb5c736893c055b59c54369533575debcd77a1b75d0c8673d63af42497a65
[INFO] running `Command { std: "docker" "start" "-a" "811eb5c736893c055b59c54369533575debcd77a1b75d0c8673d63af42497a65", kill_on_drop: false }`
[INFO] [stderr]    Compiling libcnb-rs v0.1.0 (/opt/rustwide/workdir/libcnb-rs)
[INFO] [stderr]    Compiling rustup-buildpack v0.1.0 (/opt/rustwide/workdir/buildpacks/rustup-buildpack)
[INFO] [stderr]    Compiling cargo-buildpack v0.1.0 (/opt/rustwide/workdir/buildpacks/cargo-buildpack)
[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] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> buildpacks/rustup-buildpack/src/bin/builder.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Build::from_args(std::env::args());
[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: 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.40s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "811eb5c736893c055b59c54369533575debcd77a1b75d0c8673d63af42497a65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "811eb5c736893c055b59c54369533575debcd77a1b75d0c8673d63af42497a65", kill_on_drop: false }`
[INFO] [stdout] 811eb5c736893c055b59c54369533575debcd77a1b75d0c8673d63af42497a65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2c42c27b713f73f7646272d511c503bc09597fa87ee0acc2edc55d58ee2403ed
[INFO] running `Command { std: "docker" "start" "-a" "2c42c27b713f73f7646272d511c503bc09597fa87ee0acc2edc55d58ee2403ed", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `buildpack_plan_path`
[INFO] [stderr]  --> libcnb-rs/src/build.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     buildpack_plan_path: PathBuf,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `layers_path`
[INFO] [stderr]   --> libcnb-rs/src/build.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     layers_path: PathBuf,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: field is never read: `buildpack_plan_path`
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> libcnb-rs/src/build.rs:9:5
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 9 |     buildpack_plan_path: PathBuf,
[INFO] [stdout] 
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `layers_path`
[INFO] [stderr]   --> libcnb-rs/src/build.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     layers_path: PathBuf,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]  --> buildpacks/rustup-buildpack/src/bin/builder.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Build::from_args(std::env::args());
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/cargo_detect-3e21a4a8f79b8b79)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/libcnb_rs-6c5ea02e270864cd)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rustup_build-b2b6703d4eece170)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rustup_detect-b20926093e74dd8f)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests libcnb-rs
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2c42c27b713f73f7646272d511c503bc09597fa87ee0acc2edc55d58ee2403ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c42c27b713f73f7646272d511c503bc09597fa87ee0acc2edc55d58ee2403ed", kill_on_drop: false }`
[INFO] [stdout] 2c42c27b713f73f7646272d511c503bc09597fa87ee0acc2edc55d58ee2403ed