[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 master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarkfknight%2Frust-rectangles" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/markfknight/rust-rectangles on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "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-4/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c4d9e171437f7c57cc4e6de8c5ffef4170b6d0a8a5040bc278be1b3772960c36
[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" "c4d9e171437f7c57cc4e6de8c5ffef4170b6d0a8a5040bc278be1b3772960c36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4d9e171437f7c57cc4e6de8c5ffef4170b6d0a8a5040bc278be1b3772960c36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4d9e171437f7c57cc4e6de8c5ffef4170b6d0a8a5040bc278be1b3772960c36", kill_on_drop: false }`
[INFO] [stdout] c4d9e171437f7c57cc4e6de8c5ffef4170b6d0a8a5040bc278be1b3772960c36
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1103d5bcf94e8dc849b491442cc62b188a930dd0819a63547fb3e56249e0fdd1
[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" "1103d5bcf94e8dc849b491442cc62b188a930dd0819a63547fb3e56249e0fdd1", 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: 1 warning emitted
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "1103d5bcf94e8dc849b491442cc62b188a930dd0819a63547fb3e56249e0fdd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1103d5bcf94e8dc849b491442cc62b188a930dd0819a63547fb3e56249e0fdd1", kill_on_drop: false }`
[INFO] [stdout] 1103d5bcf94e8dc849b491442cc62b188a930dd0819a63547fb3e56249e0fdd1