[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 try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomwiggers%2Fdecoder" "/workspace/builds/worker-39/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-39/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/thomwiggers/decoder on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "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-39/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" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e16876e205d42b2b52cfcdb39ec178f80fcf0df754531ca59c8ceffa0dc7ed84
[INFO] running `Command { std: "docker" "start" "-a" "e16876e205d42b2b52cfcdb39ec178f80fcf0df754531ca59c8ceffa0dc7ed84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e16876e205d42b2b52cfcdb39ec178f80fcf0df754531ca59c8ceffa0dc7ed84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e16876e205d42b2b52cfcdb39ec178f80fcf0df754531ca59c8ceffa0dc7ed84", kill_on_drop: false }`
[INFO] [stdout] e16876e205d42b2b52cfcdb39ec178f80fcf0df754531ca59c8ceffa0dc7ed84
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25fd6295ae478e0cced69094d981c463d921e8a6828c8430e109c6cb6199b1f1
[INFO] running `Command { std: "docker" "start" "-a" "25fd6295ae478e0cced69094d981c463d921e8a6828c8430e109c6cb6199b1f1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking zero_one v0.1.0 (/opt/rustwide/workdir/zero_one)
[INFO] [stderr]     Checking libc v0.2.39
[INFO] [stderr]     Checking bit_vector v0.1.0 (/opt/rustwide/workdir/bit_vector)
[INFO] [stderr]     Checking rand v0.4.2
[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]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 240 |         let _ = &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/vector.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 246 |         &Vector::from_vec(vec![0]) - &Vector::from_vec(vec![0, 1]);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 246 |         let _ = &Vector::from_vec(vec![0]) - &Vector::from_vec(vec![0, 1]);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> matrix/src/vector.rs:260:9
[INFO] [stdout]     |
[INFO] [stdout] 260 |         &Vector::from_vec(vec![1])[100];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 260 |         let _ = &Vector::from_vec(vec![1])[100];
[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]     |         ^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 471 |         let _ = 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]     |         ^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 479 |         let _ = m1 + m2;
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.06s
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "25fd6295ae478e0cced69094d981c463d921e8a6828c8430e109c6cb6199b1f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25fd6295ae478e0cced69094d981c463d921e8a6828c8430e109c6cb6199b1f1", kill_on_drop: false }`
[INFO] [stdout] 25fd6295ae478e0cced69094d981c463d921e8a6828c8430e109c6cb6199b1f1