[INFO] cloning repository https://github.com/skies-unbroken/matrix
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/skies-unbroken/matrix" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskies-unbroken%2Fmatrix", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskies-unbroken%2Fmatrix'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e820095a0ccc1eadc7ee5de7ff829b551fe18536
[INFO] checking skies-unbroken/matrix against master#c9228570668803e3e6402770d55f23a12c9ae686 for pr-79472
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskies-unbroken%2Fmatrix" "/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/skies-unbroken/matrix on toolchain c9228570668803e3e6402770d55f23a12c9ae686
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/skies-unbroken/matrix
[INFO] finished tweaking git repo https://github.com/skies-unbroken/matrix
[INFO] tweaked toml for git repo https://github.com/skies-unbroken/matrix written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/skies-unbroken/matrix already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5cfbb83aae3438be6d455f60ab36fccded45c984e1c7ff4de415fcb99b191010
[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" "5cfbb83aae3438be6d455f60ab36fccded45c984e1c7ff4de415fcb99b191010", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5cfbb83aae3438be6d455f60ab36fccded45c984e1c7ff4de415fcb99b191010", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cfbb83aae3438be6d455f60ab36fccded45c984e1c7ff4de415fcb99b191010", kill_on_drop: false }`
[INFO] [stdout] 5cfbb83aae3438be6d455f60ab36fccded45c984e1c7ff4de415fcb99b191010
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb73e87a817dc7a6f4c4ed04a5b8bfd212d410fab63e9bed4ced924968f85ab7
[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" "bb73e87a817dc7a6f4c4ed04a5b8bfd212d410fab63e9bed4ced924968f85ab7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking calc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]    --> src/lib.rs:327:33
[INFO] [stdout]     |
[INFO] [stdout] 327 |         pub fn submatrix(&self, r1: usize, r2: usize) -> Matrix {
[INFO] [stdout]     |                                 ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]    --> src/lib.rs:327:44
[INFO] [stdout]     |
[INFO] [stdout] 327 |         pub fn submatrix(&self, r1: usize, r2: usize) -> Matrix {
[INFO] [stdout]     |                                            ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]    --> src/lib.rs:327:33
[INFO] [stdout]     |
[INFO] [stdout] 327 |         pub fn submatrix(&self, r1: usize, r2: usize) -> Matrix {
[INFO] [stdout]     |                                 ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]    --> src/lib.rs:327:44
[INFO] [stdout]     |
[INFO] [stdout] 327 |         pub fn submatrix(&self, r1: usize, r2: usize) -> Matrix {
[INFO] [stdout]     |                                            ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.28s
[INFO] running `Command { std: "docker" "inspect" "bb73e87a817dc7a6f4c4ed04a5b8bfd212d410fab63e9bed4ced924968f85ab7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb73e87a817dc7a6f4c4ed04a5b8bfd212d410fab63e9bed4ced924968f85ab7", kill_on_drop: false }`
[INFO] [stdout] bb73e87a817dc7a6f4c4ed04a5b8bfd212d410fab63e9bed4ced924968f85ab7