[INFO] fetching crate cayley 0.2.0...
[INFO] checking cayley-0.2.0 against master#61cc47e367d7be91e13bcd01e4e96e0e233d4f6d for pr-133502-21
[INFO] extracting crate cayley 0.2.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate cayley 0.2.0
[INFO] finished tweaking crates.io crate cayley 0.2.0
[INFO] tweaked toml for crates.io crate cayley 0.2.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate cayley 0.2.0 on toolchain 61cc47e367d7be91e13bcd01e4e96e0e233d4f6d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+61cc47e367d7be91e13bcd01e4e96e0e233d4f6d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+61cc47e367d7be91e13bcd01e4e96e0e233d4f6d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+61cc47e367d7be91e13bcd01e4e96e0e233d4f6d" "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-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+61cc47e367d7be91e13bcd01e4e96e0e233d4f6d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e6a355b3886f7a4064238dc74db765e2569814a2eb5d496994d3be0a9221e7b
[INFO] running `Command { std: "docker" "start" "-a" "6e6a355b3886f7a4064238dc74db765e2569814a2eb5d496994d3be0a9221e7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e6a355b3886f7a4064238dc74db765e2569814a2eb5d496994d3be0a9221e7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e6a355b3886f7a4064238dc74db765e2569814a2eb5d496994d3be0a9221e7b", kill_on_drop: false }`
[INFO] [stdout] 6e6a355b3886f7a4064238dc74db765e2569814a2eb5d496994d3be0a9221e7b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+61cc47e367d7be91e13bcd01e4e96e0e233d4f6d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0779b48e0aeeff6a87eda75645b67d16f237c8a6ec4c11658d4f36ef1c029836
[INFO] running `Command { std: "docker" "start" "-a" "0779b48e0aeeff6a87eda75645b67d16f237c8a6ec4c11658d4f36ef1c029836", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking cayley v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `m1`
[INFO] [stdout]    --> src/tests.rs:147:13
[INFO] [stdout]     |
[INFO] [stdout] 147 |         let m1: Matrix<i32, 2, 3> = Matrix::from(vec![vec![1, 2, 3], vec![4, 5, 6]]);
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_m1`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m2`
[INFO] [stdout]    --> src/tests.rs:148:13
[INFO] [stdout]     |
[INFO] [stdout] 148 |         let m2: Matrix<i32, 2, 2> = Matrix::from(vec![vec![1, 2], vec![3, 4]]);
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_m2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.82s
[INFO] running `Command { std: "docker" "inspect" "0779b48e0aeeff6a87eda75645b67d16f237c8a6ec4c11658d4f36ef1c029836", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0779b48e0aeeff6a87eda75645b67d16f237c8a6ec4c11658d4f36ef1c029836", kill_on_drop: false }`
[INFO] [stdout] 0779b48e0aeeff6a87eda75645b67d16f237c8a6ec4c11658d4f36ef1c029836