[INFO] cloning repository https://github.com/titusdmoore/interpreter-book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/titusdmoore/interpreter-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftitusdmoore%2Finterpreter-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftitusdmoore%2Finterpreter-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 49681e44ec6c0d1f8ff9336d91750e6e717d947c
[INFO] checking titusdmoore/interpreter-book against master#6f40082313d8374bdf962aba943a712d5322fae6 for pr-117967
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftitusdmoore%2Finterpreter-book" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/titusdmoore/interpreter-book on toolchain 6f40082313d8374bdf962aba943a712d5322fae6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6f40082313d8374bdf962aba943a712d5322fae6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/titusdmoore/interpreter-book
[INFO] finished tweaking git repo https://github.com/titusdmoore/interpreter-book
[INFO] tweaked toml for git repo https://github.com/titusdmoore/interpreter-book written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/titusdmoore/interpreter-book 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" "+6f40082313d8374bdf962aba943a712d5322fae6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking titusdmoore/interpreter-book against try#57fd74335bb14b59b719dc3cc5bc4257e73f33ce for pr-117967
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftitusdmoore%2Finterpreter-book" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/titusdmoore/interpreter-book on toolchain 57fd74335bb14b59b719dc3cc5bc4257e73f33ce
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/titusdmoore/interpreter-book
[INFO] finished tweaking git repo https://github.com/titusdmoore/interpreter-book
[INFO] tweaked toml for git repo https://github.com/titusdmoore/interpreter-book written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/titusdmoore/interpreter-book 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" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ab21af3e5359034b903c3f1e158abf6ed3853af4f61863a58c8879bd2294934
[INFO] running `Command { std: "docker" "start" "-a" "5ab21af3e5359034b903c3f1e158abf6ed3853af4f61863a58c8879bd2294934", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ab21af3e5359034b903c3f1e158abf6ed3853af4f61863a58c8879bd2294934", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ab21af3e5359034b903c3f1e158abf6ed3853af4f61863a58c8879bd2294934", kill_on_drop: false }`
[INFO] [stdout] 5ab21af3e5359034b903c3f1e158abf6ed3853af4f61863a58c8879bd2294934
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2dd22c24e34678636f6ac088bdeddb13f59bbc4a641dbfd80f20c512d027479b
[INFO] running `Command { std: "docker" "start" "-a" "2dd22c24e34678636f6ac088bdeddb13f59bbc4a641dbfd80f20c512d027479b", kill_on_drop: false }`
[INFO] [stderr]     Checking interpreter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `Tokens` is never used
[INFO] [stdout]  --> src/main.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Tokens {
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `to_token` is never used
[INFO] [stdout]   --> src/main.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl Tokens {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 29 |     fn to_token(token_str: String) -> Tokens {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Tokens` is never used
[INFO] [stdout]  --> src/main.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Tokens {
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `to_token` is never used
[INFO] [stdout]   --> src/main.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl Tokens {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 29 |     fn to_token(token_str: String) -> Tokens {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "2dd22c24e34678636f6ac088bdeddb13f59bbc4a641dbfd80f20c512d027479b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dd22c24e34678636f6ac088bdeddb13f59bbc4a641dbfd80f20c512d027479b", kill_on_drop: false }`
[INFO] [stdout] 2dd22c24e34678636f6ac088bdeddb13f59bbc4a641dbfd80f20c512d027479b