[INFO] fetching crate simple-grid 2.1.1...
[INFO] checking simple-grid-2.1.1 against master#19dd9535408db0f1ff3d16613619076aef524d19 for pr-115950
[INFO] extracting crate simple-grid 2.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate simple-grid 2.1.1 on toolchain 19dd9535408db0f1ff3d16613619076aef524d19
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate simple-grid 2.1.1
[INFO] finished tweaking crates.io crate simple-grid 2.1.1
[INFO] tweaked toml for crates.io crate simple-grid 2.1.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate simple-grid 2.1.1 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" "+19dd9535408db0f1ff3d16613619076aef524d19" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a72a7819df19367a00211e3ac2bb4e002cfc3e49dcd526c4a1a06cfa672afbc1
[INFO] running `Command { std: "docker" "start" "-a" "a72a7819df19367a00211e3ac2bb4e002cfc3e49dcd526c4a1a06cfa672afbc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a72a7819df19367a00211e3ac2bb4e002cfc3e49dcd526c4a1a06cfa672afbc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a72a7819df19367a00211e3ac2bb4e002cfc3e49dcd526c4a1a06cfa672afbc1", kill_on_drop: false }`
[INFO] [stdout] a72a7819df19367a00211e3ac2bb4e002cfc3e49dcd526c4a1a06cfa672afbc1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7d527e6218f286453b369f90181bc40bc025e3b5cdf85a6d387f54eef781742
[INFO] running `Command { std: "docker" "start" "-a" "d7d527e6218f286453b369f90181bc40bc025e3b5cdf85a6d387f54eef781742", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling serde_json v1.0.60
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking simple-grid v2.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `square_size` is never used
[INFO] [stdout]    --> src/lib.rs:174:8
[INFO] [stdout]     |
[INFO] [stdout] 26  | impl<T> Grid<T> {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 174 |     fn square_size(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `panic_if_empty` is never used
[INFO] [stdout]   --> src/utils.rs:74:15
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub(crate) fn panic_if_empty<T>(grid: &Grid<T>) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `panic_if_not_square` is never used
[INFO] [stdout]   --> src/utils.rs:81:15
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub(crate) fn panic_if_not_square<T>(grid: &Grid<T>) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `square_size` is never used
[INFO] [stdout]    --> src/lib.rs:174:8
[INFO] [stdout]     |
[INFO] [stdout] 26  | impl<T> Grid<T> {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 174 |     fn square_size(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `panic_if_empty` is never used
[INFO] [stdout]   --> src/utils.rs:74:15
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub(crate) fn panic_if_empty<T>(grid: &Grid<T>) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `panic_if_not_square` is never used
[INFO] [stdout]   --> src/utils.rs:81:15
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub(crate) fn panic_if_not_square<T>(grid: &Grid<T>) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.06s
[INFO] running `Command { std: "docker" "inspect" "d7d527e6218f286453b369f90181bc40bc025e3b5cdf85a6d387f54eef781742", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7d527e6218f286453b369f90181bc40bc025e3b5cdf85a6d387f54eef781742", kill_on_drop: false }`
[INFO] [stdout] d7d527e6218f286453b369f90181bc40bc025e3b5cdf85a6d387f54eef781742