[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#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexlai97%2Fsorting_algorithm_demos" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alexlai97/sorting_algorithm_demos on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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-4/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff526b1fb3a110bad12691a30b71f56307210c10e87c4833fdbfc1fc0e29d1c0
[INFO] running `Command { std: "docker" "start" "-a" "ff526b1fb3a110bad12691a30b71f56307210c10e87c4833fdbfc1fc0e29d1c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff526b1fb3a110bad12691a30b71f56307210c10e87c4833fdbfc1fc0e29d1c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff526b1fb3a110bad12691a30b71f56307210c10e87c4833fdbfc1fc0e29d1c0", kill_on_drop: false }`
[INFO] [stdout] ff526b1fb3a110bad12691a30b71f56307210c10e87c4833fdbfc1fc0e29d1c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ef15288f4800f7530475b8cf1ab2e181637a14fdf102bc9f89bc22c66295b63
[INFO] running `Command { std: "docker" "start" "-a" "8ef15288f4800f7530475b8cf1ab2e181637a14fdf102bc9f89bc22c66295b63", 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: 3 warnings emitted
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "8ef15288f4800f7530475b8cf1ab2e181637a14fdf102bc9f89bc22c66295b63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ef15288f4800f7530475b8cf1ab2e181637a14fdf102bc9f89bc22c66295b63", kill_on_drop: false }`
[INFO] [stdout] 8ef15288f4800f7530475b8cf1ab2e181637a14fdf102bc9f89bc22c66295b63