[INFO] cloning repository https://github.com/ToruNiina/rust-ising
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ToruNiina/rust-ising" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToruNiina%2Frust-ising", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToruNiina%2Frust-ising'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 020ead5384428acb2fd45a2bc0fea7ec6baa59f8
[INFO] checking ToruNiina/rust-ising against try#55b3f428b4fac6790b1e8492e0b91ff2d80aec7c for pr-77035
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToruNiina%2Frust-ising" "/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/ToruNiina/rust-ising on toolchain 55b3f428b4fac6790b1e8492e0b91ff2d80aec7c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ToruNiina/rust-ising
[INFO] finished tweaking git repo https://github.com/ToruNiina/rust-ising
[INFO] tweaked toml for git repo https://github.com/ToruNiina/rust-ising written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ToruNiina/rust-ising already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded conv v0.3.3
[INFO] [stderr]   Downloaded custom_derive v0.1.7
[INFO] [stderr]   Downloaded magenta-sys v0.1.1
[INFO] [stderr]   Downloaded bitflags v0.7.0
[INFO] [stderr]   Downloaded magenta v0.1.1
[INFO] [stderr]   Downloaded libc v0.2.30
[INFO] [stderr]   Downloaded rand v0.3.16
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 12bb911472c525ecc523b451c39616b19221167129e755491a47add1bb476a1f
[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" "12bb911472c525ecc523b451c39616b19221167129e755491a47add1bb476a1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12bb911472c525ecc523b451c39616b19221167129e755491a47add1bb476a1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12bb911472c525ecc523b451c39616b19221167129e755491a47add1bb476a1f", kill_on_drop: false }`
[INFO] [stdout] 12bb911472c525ecc523b451c39616b19221167129e755491a47add1bb476a1f
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f0b3342b939acc9d9a82637cb6c978753a8a9f46c8c6888472af71151be52fa
[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" "4f0b3342b939acc9d9a82637cb6c978753a8a9f46c8c6888472af71151be52fa", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.30
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking ising v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]    --> src/main.rs:147:63
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn step<R: Rng>(field: &mut Field, hamiltonian: &Hamiltonian, rng: &mut R) {
[INFO] [stdout]     |                                                               ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]    --> src/main.rs:147:63
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn step<R: Rng>(field: &mut Field, hamiltonian: &Hamiltonian, rng: &mut R) {
[INFO] [stdout]     |                                                               ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[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 2.32s
[INFO] running `Command { std: "docker" "inspect" "4f0b3342b939acc9d9a82637cb6c978753a8a9f46c8c6888472af71151be52fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f0b3342b939acc9d9a82637cb6c978753a8a9f46c8c6888472af71151be52fa", kill_on_drop: false }`
[INFO] [stdout] 4f0b3342b939acc9d9a82637cb6c978753a8a9f46c8c6888472af71151be52fa