[INFO] cloning repository https://github.com/dihedral-codes/rust-rref-binary
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dihedral-codes/rust-rref-binary" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdihedral-codes%2Frust-rref-binary", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdihedral-codes%2Frust-rref-binary'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a5ca8a0906ecbacb3a6c8abec67f627658912f67
[INFO] checking dihedral-codes/rust-rref-binary against try#55b3f428b4fac6790b1e8492e0b91ff2d80aec7c for pr-77035
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdihedral-codes%2Frust-rref-binary" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dihedral-codes/rust-rref-binary 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/dihedral-codes/rust-rref-binary
[INFO] finished tweaking git repo https://github.com/dihedral-codes/rust-rref-binary
[INFO] tweaked toml for git repo https://github.com/dihedral-codes/rust-rref-binary written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/dihedral-codes/rust-rref-binary 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 35cb7f3a757f325c6fc8018522af34d2b9949481a83fab8153817fafc9b9cba0
[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" "35cb7f3a757f325c6fc8018522af34d2b9949481a83fab8153817fafc9b9cba0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "35cb7f3a757f325c6fc8018522af34d2b9949481a83fab8153817fafc9b9cba0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35cb7f3a757f325c6fc8018522af34d2b9949481a83fab8153817fafc9b9cba0", kill_on_drop: false }`
[INFO] [stdout] 35cb7f3a757f325c6fc8018522af34d2b9949481a83fab8153817fafc9b9cba0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] ab5d9419152895f4cf6a079042e56c314ec9e93453df9821835d56bc65b75670
[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" "ab5d9419152895f4cf6a079042e56c314ec9e93453df9821835d56bc65b75670", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-rref-binary v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `printmat`
[INFO] [stdout]   --> src/main.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn printmat(matrix:[u64; N]) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `printmat`
[INFO] [stdout]   --> src/main.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn printmat(matrix:[u64; N]) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 0.34s
[INFO] running `Command { std: "docker" "inspect" "ab5d9419152895f4cf6a079042e56c314ec9e93453df9821835d56bc65b75670", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab5d9419152895f4cf6a079042e56c314ec9e93453df9821835d56bc65b75670", kill_on_drop: false }`
[INFO] [stdout] ab5d9419152895f4cf6a079042e56c314ec9e93453df9821835d56bc65b75670