[INFO] cloning repository https://github.com/marcolussetti/programming_rust_chapter2_gcd
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/marcolussetti/programming_rust_chapter2_gcd" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcolussetti%2Fprogramming_rust_chapter2_gcd", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcolussetti%2Fprogramming_rust_chapter2_gcd'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f42d988a4af20791bb6578279819d0bd94d19507
[INFO] testing marcolussetti/programming_rust_chapter2_gcd against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcolussetti%2Fprogramming_rust_chapter2_gcd" "/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/marcolussetti/programming_rust_chapter2_gcd on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/marcolussetti/programming_rust_chapter2_gcd
[INFO] finished tweaking git repo https://github.com/marcolussetti/programming_rust_chapter2_gcd
[INFO] tweaked toml for git repo https://github.com/marcolussetti/programming_rust_chapter2_gcd written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/marcolussetti/programming_rust_chapter2_gcd already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 32b52c8b031816369d93355929b405aa7cbd90289c4000f6d9e0e8448c1d5ed9
[INFO] running `Command { std: "docker" "start" "-a" "32b52c8b031816369d93355929b405aa7cbd90289c4000f6d9e0e8448c1d5ed9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32b52c8b031816369d93355929b405aa7cbd90289c4000f6d9e0e8448c1d5ed9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32b52c8b031816369d93355929b405aa7cbd90289c4000f6d9e0e8448c1d5ed9", kill_on_drop: false }`
[INFO] [stdout] 32b52c8b031816369d93355929b405aa7cbd90289c4000f6d9e0e8448c1d5ed9
[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=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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c8186356a993585119ca23895d26d10d3037839e5e3279633dbcb8c86fe6741
[INFO] running `Command { std: "docker" "start" "-a" "5c8186356a993585119ca23895d26d10d3037839e5e3279633dbcb8c86fe6741", 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] [stderr]    Compiling programming_rust_chapter1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected one of `!`, `.`, `::`, `;`, `?`, `{`, `}`, or an operator, found keyword `let`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     }s
[INFO] [stdout]    |       - expected one of 8 possible tokens
[INFO] [stdout] 16 | 
[INFO] [stdout] 17 |     let mut running_gcd = numbers[0];
[INFO] [stdout]    |     ^^^ unexpected token
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `programming_rust_chapter1` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "5c8186356a993585119ca23895d26d10d3037839e5e3279633dbcb8c86fe6741", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c8186356a993585119ca23895d26d10d3037839e5e3279633dbcb8c86fe6741", kill_on_drop: false }`
[INFO] [stdout] 5c8186356a993585119ca23895d26d10d3037839e5e3279633dbcb8c86fe6741