[INFO] cloning repository https://github.com/alexlai97/sorting_algorithm_demos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alexlai97/sorting_algorithm_demos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexlai97%2Fsorting_algorithm_demos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexlai97%2Fsorting_algorithm_demos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3bdfa390213822847cbb774117f87727f431825e
[INFO] checking alexlai97/sorting_algorithm_demos against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexlai97%2Fsorting_algorithm_demos" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alexlai97/sorting_algorithm_demos on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/alexlai97/sorting_algorithm_demos
[INFO] finished tweaking git repo https://github.com/alexlai97/sorting_algorithm_demos
[INFO] tweaked toml for git repo https://github.com/alexlai97/sorting_algorithm_demos written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/alexlai97/sorting_algorithm_demos already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] dc5ee7a33703bda0175334b26240a5f2bb6c448fc2f7d7544fb30907a5674477
[INFO] running `Command { std: "docker" "start" "-a" "dc5ee7a33703bda0175334b26240a5f2bb6c448fc2f7d7544fb30907a5674477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc5ee7a33703bda0175334b26240a5f2bb6c448fc2f7d7544fb30907a5674477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc5ee7a33703bda0175334b26240a5f2bb6c448fc2f7d7544fb30907a5674477", kill_on_drop: false }`
[INFO] [stdout] dc5ee7a33703bda0175334b26240a5f2bb6c448fc2f7d7544fb30907a5674477
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba65ea2621f4a27691f135915688596781b8dab3f8a76e67a7b98997484e9a25
[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" "ba65ea2621f4a27691f135915688596781b8dab3f8a76e67a7b98997484e9a25", kill_on_drop: false }`
[INFO] [stderr]     Checking sorting_algs_demos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `self::Node::*`
[INFO] [stdout]  --> src/binarytreesort.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use self::Node::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/binarytreesort.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn binarytreesort(mut array: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]   |                       ----^^^^^
[INFO] [stdout]   |                       |
[INFO] [stdout]   |                       help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Node`
[INFO] [stdout]   --> src/binarytreesort.rs:23:6
[INFO] [stdout]    |
[INFO] [stdout] 23 | enum Node {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::Node::*`
[INFO] [stdout]  --> src/binarytreesort.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use self::Node::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/binarytreesort.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn binarytreesort(mut array: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]   |                       ----^^^^^
[INFO] [stdout]   |                       |
[INFO] [stdout]   |                       help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Node`
[INFO] [stdout]   --> src/binarytreesort.rs:23:6
[INFO] [stdout]    |
[INFO] [stdout] 23 | enum Node {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `Command { std: "docker" "inspect" "ba65ea2621f4a27691f135915688596781b8dab3f8a76e67a7b98997484e9a25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba65ea2621f4a27691f135915688596781b8dab3f8a76e67a7b98997484e9a25", kill_on_drop: false }`
[INFO] [stdout] ba65ea2621f4a27691f135915688596781b8dab3f8a76e67a7b98997484e9a25