[INFO] cloning repository https://github.com/kazu914/nand2tetris_virtual_machine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kazu914/nand2tetris_virtual_machine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazu914%2Fnand2tetris_virtual_machine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazu914%2Fnand2tetris_virtual_machine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2753de6134261ae330f60746f237b8a603c71522
[INFO] checking kazu914/nand2tetris_virtual_machine against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazu914%2Fnand2tetris_virtual_machine" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kazu914/nand2tetris_virtual_machine on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kazu914/nand2tetris_virtual_machine
[INFO] finished tweaking git repo https://github.com/kazu914/nand2tetris_virtual_machine
[INFO] tweaked toml for git repo https://github.com/kazu914/nand2tetris_virtual_machine written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/kazu914/nand2tetris_virtual_machine already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 4520af8c6c45c9d3a702f1170ce291ec1522ea00ea718872a88dcee93f2e7507
[INFO] running `Command { std: "docker" "start" "-a" "4520af8c6c45c9d3a702f1170ce291ec1522ea00ea718872a88dcee93f2e7507", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4520af8c6c45c9d3a702f1170ce291ec1522ea00ea718872a88dcee93f2e7507", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4520af8c6c45c9d3a702f1170ce291ec1522ea00ea718872a88dcee93f2e7507", kill_on_drop: false }`
[INFO] [stdout] 4520af8c6c45c9d3a702f1170ce291ec1522ea00ea718872a88dcee93f2e7507
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd8abdc3c640207014a47e7688375dafbed59413cf8c7023fadfa4f045a49518
[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" "cd8abdc3c640207014a47e7688375dafbed59413cf8c7023fadfa4f045a49518", kill_on_drop: false }`
[INFO] [stderr]     Checking virtual_machine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `file_name`
[INFO] [stdout]   --> src/code_writer.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     file_name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `file_name`
[INFO] [stdout]   --> src/code_writer.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     file_name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `Command { std: "docker" "inspect" "cd8abdc3c640207014a47e7688375dafbed59413cf8c7023fadfa4f045a49518", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd8abdc3c640207014a47e7688375dafbed59413cf8c7023fadfa4f045a49518", kill_on_drop: false }`
[INFO] [stdout] cd8abdc3c640207014a47e7688375dafbed59413cf8c7023fadfa4f045a49518