[INFO] cloning repository https://github.com/swizzard/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/swizzard/rust-mazes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswizzard%2Frust-mazes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswizzard%2Frust-mazes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 46d2f9f69c6ba91b75dab043e72d95d8953a9c8c
[INFO] checking swizzard/rust-mazes against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswizzard%2Frust-mazes" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/swizzard/rust-mazes on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/swizzard/rust-mazes
[INFO] finished tweaking git repo https://github.com/swizzard/rust-mazes
[INFO] tweaked toml for git repo https://github.com/swizzard/rust-mazes written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/swizzard/rust-mazes already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 715fdf2e326b780d8a6f06213d12261eb8473e05aa433e8c540a817082a1573d
[INFO] running `Command { std: "docker" "start" "-a" "715fdf2e326b780d8a6f06213d12261eb8473e05aa433e8c540a817082a1573d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "715fdf2e326b780d8a6f06213d12261eb8473e05aa433e8c540a817082a1573d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "715fdf2e326b780d8a6f06213d12261eb8473e05aa433e8c540a817082a1573d", kill_on_drop: false }`
[INFO] [stdout] 715fdf2e326b780d8a6f06213d12261eb8473e05aa433e8c540a817082a1573d
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d8c9f84862da064a1907aeeb5edc9c345110c2c9929787bb8a782f2450b5671
[INFO] running `Command { std: "docker" "start" "-a" "7d8c9f84862da064a1907aeeb5edc9c345110c2c9929787bb8a782f2450b5671", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.29
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking mazes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/maze.rs:302:21
[INFO] [stdout]     |
[INFO] [stdout] 302 |             assert!(c.loc.column >= 0);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/maze.rs:304:21
[INFO] [stdout]     |
[INFO] [stdout] 304 |             assert!(c.loc.column >= 0);
[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 1.85s
[INFO] running `Command { std: "docker" "inspect" "7d8c9f84862da064a1907aeeb5edc9c345110c2c9929787bb8a782f2450b5671", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d8c9f84862da064a1907aeeb5edc9c345110c2c9929787bb8a782f2450b5671", kill_on_drop: false }`
[INFO] [stdout] 7d8c9f84862da064a1907aeeb5edc9c345110c2c9929787bb8a782f2450b5671