[INFO] cloning repository https://github.com/AndreiKazakov/rust-regex-engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AndreiKazakov/rust-regex-engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndreiKazakov%2Frust-regex-engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndreiKazakov%2Frust-regex-engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dddaf8646aa02b04eb55661827c70fd09d193ba2
[INFO] checking AndreiKazakov/rust-regex-engine against master#f5f33ec0e0455eefa72fc5567eb1280a4d5ee206 for pr-83312
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndreiKazakov%2Frust-regex-engine" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AndreiKazakov/rust-regex-engine on toolchain f5f33ec0e0455eefa72fc5567eb1280a4d5ee206
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/AndreiKazakov/rust-regex-engine
[INFO] finished tweaking git repo https://github.com/AndreiKazakov/rust-regex-engine
[INFO] tweaked toml for git repo https://github.com/AndreiKazakov/rust-regex-engine written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/AndreiKazakov/rust-regex-engine already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "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] 7febde5f826f89dfe0034a3308b9bc46a50eb21d78829ca1e18c2cea99340ea0
[INFO] running `Command { std: "docker" "start" "-a" "7febde5f826f89dfe0034a3308b9bc46a50eb21d78829ca1e18c2cea99340ea0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7febde5f826f89dfe0034a3308b9bc46a50eb21d78829ca1e18c2cea99340ea0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7febde5f826f89dfe0034a3308b9bc46a50eb21d78829ca1e18c2cea99340ea0", kill_on_drop: false }`
[INFO] [stdout] 7febde5f826f89dfe0034a3308b9bc46a50eb21d78829ca1e18c2cea99340ea0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d79e744feab18307cdec70662dc2efb0ab57a3b660ba068a3e343dc66bf1ce7
[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" "1d79e744feab18307cdec70662dc2efb0ab57a3b660ba068a3e343dc66bf1ce7", kill_on_drop: false }`
[INFO] [stderr]     Checking re v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `walk`
[INFO] [stdout]   --> src/nfa.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn walk(nfa: NFA, text: String) -> bool {
[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 2.48s
[INFO] running `Command { std: "docker" "inspect" "1d79e744feab18307cdec70662dc2efb0ab57a3b660ba068a3e343dc66bf1ce7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d79e744feab18307cdec70662dc2efb0ab57a3b660ba068a3e343dc66bf1ce7", kill_on_drop: false }`
[INFO] [stdout] 1d79e744feab18307cdec70662dc2efb0ab57a3b660ba068a3e343dc66bf1ce7