[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#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexlai97%2Fsorting_algorithm_demos" "/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/alexlai97/sorting_algorithm_demos on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-3/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" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a981d51c6e1a5d1bf246ef9db86d538946f964bad08ab912e7451efc86fde311
[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" "a981d51c6e1a5d1bf246ef9db86d538946f964bad08ab912e7451efc86fde311", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a981d51c6e1a5d1bf246ef9db86d538946f964bad08ab912e7451efc86fde311", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a981d51c6e1a5d1bf246ef9db86d538946f964bad08ab912e7451efc86fde311", kill_on_drop: false }`
[INFO] [stdout] a981d51c6e1a5d1bf246ef9db86d538946f964bad08ab912e7451efc86fde311
[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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2afc73a894a83e1434078ccc079572c598259c2a14c3b1f2372294145182d8b3
[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" "2afc73a894a83e1434078ccc079572c598259c2a14c3b1f2372294145182d8b3", 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: 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: 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 0.48s
[INFO] running `Command { std: "docker" "inspect" "2afc73a894a83e1434078ccc079572c598259c2a14c3b1f2372294145182d8b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2afc73a894a83e1434078ccc079572c598259c2a14c3b1f2372294145182d8b3", kill_on_drop: false }`
[INFO] [stdout] 2afc73a894a83e1434078ccc079572c598259c2a14c3b1f2372294145182d8b3