[INFO] cloning repository https://github.com/safrannn/rust-parallel-examples
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/safrannn/rust-parallel-examples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsafrannn%2Frust-parallel-examples", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsafrannn%2Frust-parallel-examples'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a675157840ca2f13d84f1feb3a486d4c3a079604
[INFO] checking safrannn/rust-parallel-examples against try#82acd1d76add2232e19c1f0feb250d2a19ec6efe for pr-81213
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsafrannn%2Frust-parallel-examples" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/safrannn/rust-parallel-examples on toolchain 82acd1d76add2232e19c1f0feb250d2a19ec6efe
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/safrannn/rust-parallel-examples
[INFO] finished tweaking git repo https://github.com/safrannn/rust-parallel-examples
[INFO] tweaked toml for git repo https://github.com/safrannn/rust-parallel-examples written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/safrannn/rust-parallel-examples already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "fetch" "--locked" "--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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a4224bb6507cc76209212c1790d9b213a46e4f3cdd2970a6bd54868383218562
[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" "a4224bb6507cc76209212c1790d9b213a46e4f3cdd2970a6bd54868383218562", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a4224bb6507cc76209212c1790d9b213a46e4f3cdd2970a6bd54868383218562", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4224bb6507cc76209212c1790d9b213a46e4f3cdd2970a6bd54868383218562", kill_on_drop: false }`
[INFO] [stdout] a4224bb6507cc76209212c1790d9b213a46e4f3cdd2970a6bd54868383218562
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8278d53f8d8d940b452c3368a73e1803758f6cc75cc44698d9e28c0628daad19
[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" "8278d53f8d8d940b452c3368a73e1803758f6cc75cc44698d9e28c0628daad19", kill_on_drop: false }`
[INFO] [stderr]    Compiling const_fn v0.4.5
[INFO] [stderr]    Compiling getrandom v0.2.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking rand_core v0.6.1
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking crossbeam-queue v0.3.1
[INFO] [stderr]     Checking rand v0.8.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking crossbeam v0.8.0
[INFO] [stderr]     Checking rust_parallel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `create_matrix`
[INFO] [stdout]  --> src/matrix_multiplication.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn create_matrix(n: usize) -> Vec<Vec<f64>> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_idendity_matrix`
[INFO] [stdout]   --> src/matrix_multiplication.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn create_idendity_matrix(n: usize) -> Vec<Vec<f64>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `matrix_multiplication`
[INFO] [stdout]   --> src/matrix_multiplication.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn matrix_multiplication(matrix: &Vec<Vec<f64>>, exp: usize) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]   --> src/matrix_multiplication.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_matrix`
[INFO] [stdout]  --> src/matrix_multiplication.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn create_matrix(n: usize) -> Vec<Vec<f64>> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_idendity_matrix`
[INFO] [stdout]   --> src/matrix_multiplication.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn create_idendity_matrix(n: usize) -> Vec<Vec<f64>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `matrix_multiplication`
[INFO] [stdout]   --> src/matrix_multiplication.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn matrix_multiplication(matrix: &Vec<Vec<f64>>, exp: usize) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]   --> src/matrix_multiplication.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.62s
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8278d53f8d8d940b452c3368a73e1803758f6cc75cc44698d9e28c0628daad19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8278d53f8d8d940b452c3368a73e1803758f6cc75cc44698d9e28c0628daad19", kill_on_drop: false }`
[INFO] [stdout] 8278d53f8d8d940b452c3368a73e1803758f6cc75cc44698d9e28c0628daad19