[INFO] cloning repository https://github.com/brendanburkhart/mols
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brendanburkhart/mols" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrendanburkhart%2Fmols", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrendanburkhart%2Fmols'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f4ae1e225351c4a82f9deada290684a6b602a239
[INFO] checking brendanburkhart/mols against master#0599f3403366d9c57f0625e6de3af214b5042a90 for pr-87710
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrendanburkhart%2Fmols" "/workspace/builds/worker-61/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-61/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/brendanburkhart/mols on toolchain 0599f3403366d9c57f0625e6de3af214b5042a90
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/brendanburkhart/mols
[INFO] finished tweaking git repo https://github.com/brendanburkhart/mols
[INFO] tweaked toml for git repo https://github.com/brendanburkhart/mols written to /workspace/builds/worker-61/source/Cargo.toml
[INFO] crate git repo https://github.com/brendanburkhart/mols already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 42cca7a9f2f589507716028a408a7dade31353836c1c6ba3b1f1c98ef28904dd
[INFO] running `Command { std: "docker" "start" "-a" "42cca7a9f2f589507716028a408a7dade31353836c1c6ba3b1f1c98ef28904dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42cca7a9f2f589507716028a408a7dade31353836c1c6ba3b1f1c98ef28904dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42cca7a9f2f589507716028a408a7dade31353836c1c6ba3b1f1c98ef28904dd", kill_on_drop: false }`
[INFO] [stdout] 42cca7a9f2f589507716028a408a7dade31353836c1c6ba3b1f1c98ef28904dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9184e662d7352d5d66f3cb91d6a8e486b2f257255e9c242047e709efb41711d
[INFO] running `Command { std: "docker" "start" "-a" "c9184e662d7352d5d66f3cb91d6a8e486b2f257255e9c242047e709efb41711d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking mols v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `column_is_valid`
[INFO] [stdout]   --> src/latin_square.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 |     fn column_is_valid(&self, column_index: usize) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_latin`
[INFO] [stdout]   --> src/latin_square.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn is_latin(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `column_is_valid`
[INFO] [stdout]   --> src/latin_square.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 |     fn column_is_valid(&self, column_index: usize) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_latin`
[INFO] [stdout]   --> src/latin_square.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn is_latin(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.22s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c9184e662d7352d5d66f3cb91d6a8e486b2f257255e9c242047e709efb41711d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9184e662d7352d5d66f3cb91d6a8e486b2f257255e9c242047e709efb41711d", kill_on_drop: false }`
[INFO] [stdout] c9184e662d7352d5d66f3cb91d6a8e486b2f257255e9c242047e709efb41711d