[INFO] cloning repository https://github.com/skyne98/brutal-bench
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/skyne98/brutal-bench" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskyne98%2Fbrutal-bench", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskyne98%2Fbrutal-bench'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fa2efadba006b32846f5c27c55f0b9eda9b31259
[INFO] checking skyne98/brutal-bench against master#779e19d8baa3e3625bd4fc5c85cbb2ad47b43155 for pr-147589-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskyne98%2Fbrutal-bench" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/skyne98/brutal-bench
[INFO] finished tweaking git repo https://github.com/skyne98/brutal-bench
[INFO] tweaked toml for git repo https://github.com/skyne98/brutal-bench written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/skyne98/brutal-bench on toolchain 779e19d8baa3e3625bd4fc5c85cbb2ad47b43155
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/skyne98/brutal-bench already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tabwriter v1.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2fc50280b81ebf426ecfbbe9a00ff452b6fe3f9d71ab84c273bc2d706c6aa5bb
[INFO] running `Command { std: "docker" "start" "-a" "2fc50280b81ebf426ecfbbe9a00ff452b6fe3f9d71ab84c273bc2d706c6aa5bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2fc50280b81ebf426ecfbbe9a00ff452b6fe3f9d71ab84c273bc2d706c6aa5bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fc50280b81ebf426ecfbbe9a00ff452b6fe3f9d71ab84c273bc2d706c6aa5bb", kill_on_drop: false }`
[INFO] [stdout] 2fc50280b81ebf426ecfbbe9a00ff452b6fe3f9d71ab84c273bc2d706c6aa5bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a26cf023534f81d54841b09ff0a9a7bd550a003a1511e40be9daea5c1e9083f4
[INFO] running `Command { std: "docker" "start" "-a" "a26cf023534f81d54841b09ff0a9a7bd550a003a1511e40be9daea5c1e9083f4", kill_on_drop: false }`
[INFO] [stderr]     Checking bytes v1.9.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling cc v1.2.10
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[INFO] [stderr]     Checking reqwest v0.12.12
[INFO] [stderr]     Checking brutal-bench v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]   --> src/main.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     time::{Duration, Instant},
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]   --> src/main.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     time::{Duration, Instant},
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SudokuBoard` is never constructed
[INFO] [stdout]    --> src/main.rs:318:8
[INFO] [stdout]     |
[INFO] [stdout] 318 | struct SudokuBoard([[u8; 9]; 9]);
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_solved`, `remove_numbers`, and `to_string` are never used
[INFO] [stdout]    --> src/main.rs:321:8
[INFO] [stdout]     |
[INFO] [stdout] 320 | impl SudokuBoard {
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout] 321 |     fn new_solved() -> Self {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 332 |     fn remove_numbers(&self, difficulty: u8) -> Self {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 341 |     fn to_string(&self) -> String {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `difficulty` is never read
[INFO] [stdout]    --> src/main.rs:364:5
[INFO] [stdout]     |
[INFO] [stdout] 363 | struct MathBenchmark {
[INFO] [stdout]     |        ------------- field in this struct
[INFO] [stdout] 364 |     difficulty: u8,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SudokuBoard` is never constructed
[INFO] [stdout]    --> src/main.rs:318:8
[INFO] [stdout]     |
[INFO] [stdout] 318 | struct SudokuBoard([[u8; 9]; 9]);
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 32.08s
[INFO] [stdout] warning: associated items `new_solved`, `remove_numbers`, and `to_string` are never used
[INFO] [stdout]    --> src/main.rs:321:8
[INFO] [stdout]     |
[INFO] [stdout] 320 | impl SudokuBoard {
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout] 321 |     fn new_solved() -> Self {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 332 |     fn remove_numbers(&self, difficulty: u8) -> Self {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 341 |     fn to_string(&self) -> String {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `difficulty` is never read
[INFO] [stdout]    --> src/main.rs:364:5
[INFO] [stdout]     |
[INFO] [stdout] 363 | struct MathBenchmark {
[INFO] [stdout]     |        ------------- field in this struct
[INFO] [stdout] 364 |     difficulty: u8,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a26cf023534f81d54841b09ff0a9a7bd550a003a1511e40be9daea5c1e9083f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a26cf023534f81d54841b09ff0a9a7bd550a003a1511e40be9daea5c1e9083f4", kill_on_drop: false }`
[INFO] [stdout] a26cf023534f81d54841b09ff0a9a7bd550a003a1511e40be9daea5c1e9083f4