[INFO] cloning repository https://github.com/thomwiggers/decoder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thomwiggers/decoder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomwiggers%2Fdecoder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomwiggers%2Fdecoder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2d2c73442f7f6a15306b2a3acc387a3ebefb58e5
[INFO] checking thomwiggers/decoder against master#f82664191d0e8764b7435b9d72eb0e366b8b1464 for pr-83354
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomwiggers%2Fdecoder" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/thomwiggers/decoder on toolchain f82664191d0e8764b7435b9d72eb0e366b8b1464
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/thomwiggers/decoder
[INFO] finished tweaking git repo https://github.com/thomwiggers/decoder
[INFO] tweaked toml for git repo https://github.com/thomwiggers/decoder written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/thomwiggers/decoder already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b7d3d46219a21b08a94934aa6c71184a7e293c9e18338caabb901d0ec0fabe3
[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" "7b7d3d46219a21b08a94934aa6c71184a7e293c9e18338caabb901d0ec0fabe3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b7d3d46219a21b08a94934aa6c71184a7e293c9e18338caabb901d0ec0fabe3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b7d3d46219a21b08a94934aa6c71184a7e293c9e18338caabb901d0ec0fabe3", kill_on_drop: false }`
[INFO] [stdout] 7b7d3d46219a21b08a94934aa6c71184a7e293c9e18338caabb901d0ec0fabe3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 890d8d0603f61a64403153267ad2c9bb4bcf0a6e59d84db52e7d1ee84b7c4feb
[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" "890d8d0603f61a64403153267ad2c9bb4bcf0a6e59d84db52e7d1ee84b7c4feb", kill_on_drop: false }`
[INFO] [stderr]     Checking zero_one v0.1.0 (/opt/rustwide/workdir/zero_one)
[INFO] [stderr]     Checking bit_vector v0.1.0 (/opt/rustwide/workdir/bit_vector)
[INFO] [stderr]     Checking matrix v0.1.0 (/opt/rustwide/workdir/matrix)
[INFO] [stderr]     Checking decoder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> matrix/src/vector.rs:240:9
[INFO] [stdout]     |
[INFO] [stdout] 240 |         &Vector::from_vec(vec![0]) + &Vector::from_vec(vec![0, 1]);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> matrix/src/vector.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 246 |         &Vector::from_vec(vec![0]) - &Vector::from_vec(vec![0, 1]);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> matrix/src/matrix.rs:471:9
[INFO] [stdout]     |
[INFO] [stdout] 471 |         m1 + m2;
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> matrix/src/matrix.rs:479:9
[INFO] [stdout]     |
[INFO] [stdout] 479 |         m1 + m2;
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.43s
[INFO] running `Command { std: "docker" "inspect" "890d8d0603f61a64403153267ad2c9bb4bcf0a6e59d84db52e7d1ee84b7c4feb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "890d8d0603f61a64403153267ad2c9bb4bcf0a6e59d84db52e7d1ee84b7c4feb", kill_on_drop: false }`
[INFO] [stdout] 890d8d0603f61a64403153267ad2c9bb4bcf0a6e59d84db52e7d1ee84b7c4feb