[INFO] cloning repository https://github.com/Saul-Mirone/algorithms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Saul-Mirone/algorithms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaul-Mirone%2Falgorithms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaul-Mirone%2Falgorithms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e21ea71155c139e15f825592c19f9336d44d78fb
[INFO] checking Saul-Mirone/algorithms against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaul-Mirone%2Falgorithms" "/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/Saul-Mirone/algorithms on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Saul-Mirone/algorithms
[INFO] finished tweaking git repo https://github.com/Saul-Mirone/algorithms
[INFO] tweaked toml for git repo https://github.com/Saul-Mirone/algorithms written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Saul-Mirone/algorithms already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6ed9d18f5430ecd0c5f037d476b310d01ceb6061ae900e1a4bf6f34a4367a922
[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" "6ed9d18f5430ecd0c5f037d476b310d01ceb6061ae900e1a4bf6f34a4367a922", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ed9d18f5430ecd0c5f037d476b310d01ceb6061ae900e1a4bf6f34a4367a922", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ed9d18f5430ecd0c5f037d476b310d01ceb6061ae900e1a4bf6f34a4367a922", kill_on_drop: false }`
[INFO] [stdout] 6ed9d18f5430ecd0c5f037d476b310d01ceb6061ae900e1a4bf6f34a4367a922
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] c967ab65c2a92ee1d8cbf29620a76d45d64b328075be5165066392ea9e91fc06
[INFO] running `Command { std: "docker" "start" "-a" "c967ab65c2a92ee1d8cbf29620a76d45d64b328075be5165066392ea9e91fc06", kill_on_drop: false }`
[INFO] [stderr]     Checking algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `bubble`
[INFO] [stdout]  --> src/sort/bubble.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn bubble(arr: &mut [i32]) {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `selection`
[INFO] [stdout]  --> src/sort/selection.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn selection(arr: &mut [i32]) {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `insertion`
[INFO] [stdout]  --> src/sort/insertion.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn insertion(arr: &mut [i32]) {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `merge_into`
[INFO] [stdout]  --> src/sort/merge.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn merge_into(left: &[i32], right: &[i32], ret: &mut [i32]) {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `merge`
[INFO] [stdout]   --> src/sort/merge.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn merge(arr: &mut [i32]) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `quick`
[INFO] [stdout]  --> src/sort/quick.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn quick(arr: &mut [i32]) {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `inner_quick`
[INFO] [stdout]  --> src/sort/quick.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn inner_quick(arr: &mut [i32], left: usize, right: usize) {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `partition`
[INFO] [stdout]   --> src/sort/quick.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn partition(arr: &mut [i32], left: usize, right: usize) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_left_child`
[INFO] [stdout]  --> src/sort/heap.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn get_left_child(i: usize) -> usize {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_right_child`
[INFO] [stdout]  --> src/sort/heap.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn get_right_child(i: usize) -> usize {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_max_heap`
[INFO] [stdout]  --> src/sort/heap.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn build_max_heap(arr: &mut [i32], heap_size: usize) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `max_heapify`
[INFO] [stdout]   --> src/sort/heap.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn max_heapify(arr: &mut [i32], root: usize, heap_size: usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `heap`
[INFO] [stdout]   --> src/sort/heap.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn heap(arr: &mut [i32]) {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "c967ab65c2a92ee1d8cbf29620a76d45d64b328075be5165066392ea9e91fc06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c967ab65c2a92ee1d8cbf29620a76d45d64b328075be5165066392ea9e91fc06", kill_on_drop: false }`
[INFO] [stdout] c967ab65c2a92ee1d8cbf29620a76d45d64b328075be5165066392ea9e91fc06