[INFO] cloning repository https://github.com/minimalism/google-hashcode-practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/minimalism/google-hashcode-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fminimalism%2Fgoogle-hashcode-practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fminimalism%2Fgoogle-hashcode-practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a5c40bbd20f322b4156e99f43939b2f3b59ffbb9
[INFO] testing minimalism/google-hashcode-practice against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fminimalism%2Fgoogle-hashcode-practice" "/workspace/builds/worker-22/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-22/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/minimalism/google-hashcode-practice on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/minimalism/google-hashcode-practice
[INFO] finished tweaking git repo https://github.com/minimalism/google-hashcode-practice
[INFO] tweaked toml for git repo https://github.com/minimalism/google-hashcode-practice written to /workspace/builds/worker-22/source/Cargo.toml
[INFO] crate git repo https://github.com/minimalism/google-hashcode-practice already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e0e23822cb6c31a76c90d8771cbe0dce5867b2fcc0cf777b1c211385d41333d
[INFO] running `Command { std: "docker" "start" "-a" "6e0e23822cb6c31a76c90d8771cbe0dce5867b2fcc0cf777b1c211385d41333d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e0e23822cb6c31a76c90d8771cbe0dce5867b2fcc0cf777b1c211385d41333d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e0e23822cb6c31a76c90d8771cbe0dce5867b2fcc0cf777b1c211385d41333d", kill_on_drop: false }`
[INFO] [stdout] 6e0e23822cb6c31a76c90d8771cbe0dce5867b2fcc0cf777b1c211385d41333d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a22cb4bf8e737c11e1f503c2326b506f8b56ad063d4058b160e4ed4fcfc549f
[INFO] running `Command { std: "docker" "start" "-a" "2a22cb4bf8e737c11e1f503c2326b506f8b56ad063d4058b160e4ed4fcfc549f", kill_on_drop: false }`
[INFO] [stderr]    Compiling pizza-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `fmt::Display`, `ops::Add`
[INFO] [stdout]  --> src/main.rs:3:48
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{fs, collections::{HashSet, HashMap}, ops::Add, fmt::Display};
[INFO] [stdout]   |                                                ^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(hash_set_entry)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pizza-rs` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "2a22cb4bf8e737c11e1f503c2326b506f8b56ad063d4058b160e4ed4fcfc549f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a22cb4bf8e737c11e1f503c2326b506f8b56ad063d4058b160e4ed4fcfc549f", kill_on_drop: false }`
[INFO] [stdout] 2a22cb4bf8e737c11e1f503c2326b506f8b56ad063d4058b160e4ed4fcfc549f