[INFO] cloning repository https://github.com/wbigger/RustIntro
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wbigger/RustIntro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwbigger%2FRustIntro", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwbigger%2FRustIntro'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7e1c039a0b5396dc86b1435860f521e4065dea32
[INFO] checking wbigger/RustIntro against master#7dc9ff5c629753b6930ecfe9a0446538b8e25fb7 for pr-85387
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwbigger%2FRustIntro" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wbigger/RustIntro on toolchain 7dc9ff5c629753b6930ecfe9a0446538b8e25fb7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wbigger/RustIntro
[INFO] finished tweaking git repo https://github.com/wbigger/RustIntro
[INFO] tweaked toml for git repo https://github.com/wbigger/RustIntro written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/wbigger/RustIntro already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 122a9cee1173b4041545e70c06b33c18fec80b105c41793936ac9c3f0dfbceb9
[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" "122a9cee1173b4041545e70c06b33c18fec80b105c41793936ac9c3f0dfbceb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "122a9cee1173b4041545e70c06b33c18fec80b105c41793936ac9c3f0dfbceb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "122a9cee1173b4041545e70c06b33c18fec80b105c41793936ac9c3f0dfbceb9", kill_on_drop: false }`
[INFO] [stdout] 122a9cee1173b4041545e70c06b33c18fec80b105c41793936ac9c3f0dfbceb9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b02e6376d993943895f129a0b14cc5f071d38dddc040ee4ef528e16e22f97e1
[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" "2b02e6376d993943895f129a0b14cc5f071d38dddc040ee4ef528e16e22f97e1", kill_on_drop: false }`
[INFO] [stderr]     Checking RustIntro v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `vec`
[INFO] [stdout]  --> src/borrowing.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn user(vec: &Vec<i32>) {
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_vec`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vec`
[INFO] [stdout]  --> src/ownership.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn take(vec: Vec<i32>) {
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_vec`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vec`
[INFO] [stdout]  --> src/ownership.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn take(vec: Vec<i32>) {
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_vec`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vec`
[INFO] [stdout]  --> src/borrowing.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn user(vec: &Vec<i32>) {
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_vec`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]  --> src/lifetime.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let (s1,s2) = line.split_at(prefix.len());
[INFO] [stdout]   |          ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]  --> src/lifetime.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let (s1,s2) = line.split_at(prefix.len());
[INFO] [stdout]   |          ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "2b02e6376d993943895f129a0b14cc5f071d38dddc040ee4ef528e16e22f97e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b02e6376d993943895f129a0b14cc5f071d38dddc040ee4ef528e16e22f97e1", kill_on_drop: false }`
[INFO] [stdout] 2b02e6376d993943895f129a0b14cc5f071d38dddc040ee4ef528e16e22f97e1