[INFO] fetching crate simple-grid 1.0.4...
[INFO] checking simple-grid-1.0.4 against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] extracting crate simple-grid 1.0.4 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate simple-grid 1.0.4 on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate simple-grid 1.0.4
[INFO] finished tweaking crates.io crate simple-grid 1.0.4
[INFO] tweaked toml for crates.io crate simple-grid 1.0.4 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate simple-grid 1.0.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae656a66727a11d539b7a88e3f02613e8e665ef35a745d39a37ed0dea5e4ab8e
[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" "ae656a66727a11d539b7a88e3f02613e8e665ef35a745d39a37ed0dea5e4ab8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae656a66727a11d539b7a88e3f02613e8e665ef35a745d39a37ed0dea5e4ab8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae656a66727a11d539b7a88e3f02613e8e665ef35a745d39a37ed0dea5e4ab8e", kill_on_drop: false }`
[INFO] [stdout] ae656a66727a11d539b7a88e3f02613e8e665ef35a745d39a37ed0dea5e4ab8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e492bc986df82fc04a65f0fb6b03b29020ff9e74aec1900298c926d146fbc85e
[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" "e492bc986df82fc04a65f0fb6b03b29020ff9e74aec1900298c926d146fbc85e", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling serde_json v1.0.60
[INFO] [stderr]     Checking simple-grid v1.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `panic_if_empty`
[INFO] [stdout]   --> src/utils.rs:61:15
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub(crate) fn panic_if_empty<T>(grid: &Grid<T>) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `panic_if_not_square`
[INFO] [stdout]   --> src/utils.rs:68:15
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub(crate) fn panic_if_not_square<T>(grid: &Grid<T>) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `panic_if_empty`
[INFO] [stdout]   --> src/utils.rs:61:15
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub(crate) fn panic_if_empty<T>(grid: &Grid<T>) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `panic_if_not_square`
[INFO] [stdout]   --> src/utils.rs:68:15
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub(crate) fn panic_if_not_square<T>(grid: &Grid<T>) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.37s
[INFO] running `Command { std: "docker" "inspect" "e492bc986df82fc04a65f0fb6b03b29020ff9e74aec1900298c926d146fbc85e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e492bc986df82fc04a65f0fb6b03b29020ff9e74aec1900298c926d146fbc85e", kill_on_drop: false }`
[INFO] [stdout] e492bc986df82fc04a65f0fb6b03b29020ff9e74aec1900298c926d146fbc85e