[INFO] cloning repository https://github.com/markfknight/rust-rectangles
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/markfknight/rust-rectangles" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarkfknight%2Frust-rectangles", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarkfknight%2Frust-rectangles'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a9066a98f3f2d8bbda10759e373719162171ad5a
[INFO] checking markfknight/rust-rectangles against try#575650af7d7ca88602df28e39d27bf3e456c306e for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarkfknight%2Frust-rectangles" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/markfknight/rust-rectangles on toolchain 575650af7d7ca88602df28e39d27bf3e456c306e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/markfknight/rust-rectangles
[INFO] finished tweaking git repo https://github.com/markfknight/rust-rectangles
[INFO] tweaked toml for git repo https://github.com/markfknight/rust-rectangles written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/markfknight/rust-rectangles already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6bb7d816c0cb92e7436bdcd4a0fa22ea22f97e7a3566b2707962d4df4c3fa80f
[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" "6bb7d816c0cb92e7436bdcd4a0fa22ea22f97e7a3566b2707962d4df4c3fa80f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6bb7d816c0cb92e7436bdcd4a0fa22ea22f97e7a3566b2707962d4df4c3fa80f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bb7d816c0cb92e7436bdcd4a0fa22ea22f97e7a3566b2707962d4df4c3fa80f", kill_on_drop: false }`
[INFO] [stdout] 6bb7d816c0cb92e7436bdcd4a0fa22ea22f97e7a3566b2707962d4df4c3fa80f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 339219c54d1efe6911d6349ff82a7dd301f558407d79ad79e1373a5aee99e9d9
[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" "339219c54d1efe6911d6349ff82a7dd301f558407d79ad79e1373a5aee99e9d9", kill_on_drop: false }`
[INFO] [stderr]     Checking rectangles v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `tweet`
[INFO] [stdout]  --> src/main.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let tweet = Tweet {
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_tweet`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tweet`
[INFO] [stdout]  --> src/main.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let tweet = Tweet {
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_tweet`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "339219c54d1efe6911d6349ff82a7dd301f558407d79ad79e1373a5aee99e9d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "339219c54d1efe6911d6349ff82a7dd301f558407d79ad79e1373a5aee99e9d9", kill_on_drop: false }`
[INFO] [stdout] 339219c54d1efe6911d6349ff82a7dd301f558407d79ad79e1373a5aee99e9d9