[INFO] cloning repository https://github.com/bruce/rust-mazes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bruce/rust-mazes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbruce%2Frust-mazes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbruce%2Frust-mazes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 678739609b4cc22ca4c08e98f2c38976f34c77cf
[INFO] checking bruce/rust-mazes/678739609b4cc22ca4c08e98f2c38976f34c77cf against master#c29082fe7dc6e902169cacbae165562a7e4a1fd6 for pr-120805
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbruce%2Frust-mazes" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bruce/rust-mazes on toolchain c29082fe7dc6e902169cacbae165562a7e4a1fd6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c29082fe7dc6e902169cacbae165562a7e4a1fd6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bruce/rust-mazes
[INFO] finished tweaking git repo https://github.com/bruce/rust-mazes
[INFO] tweaked toml for git repo https://github.com/bruce/rust-mazes written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/bruce/rust-mazes 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" "+c29082fe7dc6e902169cacbae165562a7e4a1fd6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+c29082fe7dc6e902169cacbae165562a7e4a1fd6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87c84ae6c405dcd201aa4532914a5cbf400812f2c4d68c079b131326285409a0
[INFO] running `Command { std: "docker" "start" "-a" "87c84ae6c405dcd201aa4532914a5cbf400812f2c4d68c079b131326285409a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87c84ae6c405dcd201aa4532914a5cbf400812f2c4d68c079b131326285409a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87c84ae6c405dcd201aa4532914a5cbf400812f2c4d68c079b131326285409a0", kill_on_drop: false }`
[INFO] [stdout] 87c84ae6c405dcd201aa4532914a5cbf400812f2c4d68c079b131326285409a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+c29082fe7dc6e902169cacbae165562a7e4a1fd6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cade4982863744f9f6c60cb29d21192b53a36fa122efb1d39c2981beeb20b7af
[INFO] running `Command { std: "docker" "start" "-a" "cade4982863744f9f6c60cb29d21192b53a36fa122efb1d39c2981beeb20b7af", kill_on_drop: false }`
[INFO] [stderr]     Checking mazes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/grid.rs:22:20
[INFO] [stdout]    |
[INFO] [stdout] 22 |         for col in (1..cols) {
[INFO] [stdout]    |                    ^       ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 22 -         for col in (1..cols) {
[INFO] [stdout] 22 +         for col in 1..cols {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/grid.rs:24:24
[INFO] [stdout]    |
[INFO] [stdout] 24 |             for row in (1..rows) {
[INFO] [stdout]    |                        ^       ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 24 -             for row in (1..rows) {
[INFO] [stdout] 24 +             for row in 1..rows {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/grid.rs:22:20
[INFO] [stdout]    |
[INFO] [stdout] 22 |         for col in (1..cols) {
[INFO] [stdout]    |                    ^       ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 22 -         for col in (1..cols) {
[INFO] [stdout] 22 +         for col in 1..cols {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/grid.rs:24:24
[INFO] [stdout]    |
[INFO] [stdout] 24 |             for row in (1..rows) {
[INFO] [stdout]    |                        ^       ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 24 -             for row in (1..rows) {
[INFO] [stdout] 24 +             for row in 1..rows {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "cade4982863744f9f6c60cb29d21192b53a36fa122efb1d39c2981beeb20b7af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cade4982863744f9f6c60cb29d21192b53a36fa122efb1d39c2981beeb20b7af", kill_on_drop: false }`
[INFO] [stdout] cade4982863744f9f6c60cb29d21192b53a36fa122efb1d39c2981beeb20b7af