[INFO] cloning repository https://github.com/benbachem/se02
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/benbachem/se02" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbenbachem%2Fse02"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbenbachem%2Fse02'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a80bc8494e3520b45eae2965ef176df835377520
[INFO] checking benbachem/se02 against try#13f916f63bc6575d5ff1f989237dfabe88981368 for pr-69880
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbenbachem%2Fse02" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/benbachem/se02 on toolchain 13f916f63bc6575d5ff1f989237dfabe88981368
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/benbachem/se02
[INFO] finished tweaking git repo https://github.com/benbachem/se02
[INFO] tweaked toml for git repo https://github.com/benbachem/se02 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/benbachem/se02 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 20058c1b19cb646ff6056767f939217c866f044a7eeb2c1b3f9b4e63a8cacf9d
[INFO] running `"docker" "start" "-a" "20058c1b19cb646ff6056767f939217c866f044a7eeb2c1b3f9b4e63a8cacf9d"`
[INFO] [stderr]     Checking algos-data-structures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `j`
[INFO] [stderr]   --> src/sorting_algorithms.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |     for j in 1..list.len() {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_j`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_sorted_i32`
[INFO] [stderr]  --> src/sorting_algorithms.rs:5:4
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn is_sorted_i32(input: &Vec<i32>) -> bool {
[INFO] [stderr]   |    ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `stupid_sort_i32`
[INFO] [stderr]   --> src/sorting_algorithms.rs:20:4
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn stupid_sort_i32(unsorted: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bubblesort_i32`
[INFO] [stderr]   --> src/sorting_algorithms.rs:35:4
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn bubblesort_i32(unsorted: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `selection_sort_i32`
[INFO] [stderr]   --> src/sorting_algorithms.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 | fn selection_sort_i32(unsorted: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Node`
[INFO] [stderr]  --> src/structures/stack.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Node {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Stack`
[INFO] [stderr]  --> src/structures/stack.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct Stack {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/structures/stack.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push`
[INFO] [stderr]   --> src/structures/stack.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn push(&mut self, value: i32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]   --> src/structures/stack.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn pop(&mut self) -> Option<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `j`
[INFO] [stderr]   --> src/sorting_algorithms.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |     for j in 1..list.len() {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_j`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `"docker" "inspect" "20058c1b19cb646ff6056767f939217c866f044a7eeb2c1b3f9b4e63a8cacf9d"`
[INFO] running `"docker" "rm" "-f" "20058c1b19cb646ff6056767f939217c866f044a7eeb2c1b3f9b4e63a8cacf9d"`
[INFO] [stdout] 20058c1b19cb646ff6056767f939217c866f044a7eeb2c1b3f9b4e63a8cacf9d