[INFO] cloning repository https://github.com/RockyTV/rust-nbr6023
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RockyTV/rust-nbr6023" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRockyTV%2Frust-nbr6023", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRockyTV%2Frust-nbr6023'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9125571df28e8e940e03fc2f1d05482af0937e36
[INFO] checking RockyTV/rust-nbr6023 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRockyTV%2Frust-nbr6023" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RockyTV/rust-nbr6023 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/RockyTV/rust-nbr6023
[INFO] finished tweaking git repo https://github.com/RockyTV/rust-nbr6023
[INFO] tweaked toml for git repo https://github.com/RockyTV/rust-nbr6023 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/RockyTV/rust-nbr6023 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff3cb3787ec37566b9680cafe4163ecf31573cc39d065b1410e4e56ad7d66ee1
[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" "ff3cb3787ec37566b9680cafe4163ecf31573cc39d065b1410e4e56ad7d66ee1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff3cb3787ec37566b9680cafe4163ecf31573cc39d065b1410e4e56ad7d66ee1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff3cb3787ec37566b9680cafe4163ecf31573cc39d065b1410e4e56ad7d66ee1", kill_on_drop: false }`
[INFO] [stdout] ff3cb3787ec37566b9680cafe4163ecf31573cc39d065b1410e4e56ad7d66ee1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6f7a48458b328e83a28c40a702fb73ae3c9f1deec875296d437071ff56a7b01
[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" "c6f7a48458b328e83a28c40a702fb73ae3c9f1deec875296d437071ff56a7b01", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-nbr6023 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `title`
[INFO] [stdout]   --> src/main.rs:10:37
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn generate_reference(author: &str, title: &str, year: &str, link: &str) -> String {
[INFO] [stdout]    |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_title`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `year`
[INFO] [stdout]   --> src/main.rs:10:50
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn generate_reference(author: &str, title: &str, year: &str, link: &str) -> String {
[INFO] [stdout]    |                                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_year`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `link`
[INFO] [stdout]   --> src/main.rs:10:62
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn generate_reference(author: &str, title: &str, year: &str, link: &str) -> String {
[INFO] [stdout]    |                                                              ^^^^ help: if this is intentional, prefix it with an underscore: `_link`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let mut author_surname: &str = match author_parts.pop() {
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `title`
[INFO] [stdout]   --> src/main.rs:10:37
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn generate_reference(author: &str, title: &str, year: &str, link: &str) -> String {
[INFO] [stdout]    |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_title`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `year`
[INFO] [stdout]   --> src/main.rs:10:50
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn generate_reference(author: &str, title: &str, year: &str, link: &str) -> String {
[INFO] [stdout]    |                                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_year`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `link`
[INFO] [stdout]   --> src/main.rs:10:62
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn generate_reference(author: &str, title: &str, year: &str, link: &str) -> String {
[INFO] [stdout]    |                                                              ^^^^ help: if this is intentional, prefix it with an underscore: `_link`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let mut author_surname: &str = match author_parts.pop() {
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c6f7a48458b328e83a28c40a702fb73ae3c9f1deec875296d437071ff56a7b01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6f7a48458b328e83a28c40a702fb73ae3c9f1deec875296d437071ff56a7b01", kill_on_drop: false }`
[INFO] [stdout] c6f7a48458b328e83a28c40a702fb73ae3c9f1deec875296d437071ff56a7b01