[INFO] updating cached repository https://github.com/sebashack/rust_algorithms
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/sebashack/rust_algorithms
[INFO] [stderr]    e15dd63..c475170  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c47517018269755592bf41ed2ea2db6853031938
[INFO] checking sebashack/rust_algorithms against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsebashack%2Frust_algorithms" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sebashack/rust_algorithms on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/sebashack/rust_algorithms
[INFO] finished tweaking git repo https://github.com/sebashack/rust_algorithms
[INFO] tweaked toml for git repo https://github.com/sebashack/rust_algorithms written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/sebashack/rust_algorithms already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "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" "+45d050cde277b22a755847338f2acc2c7b834141" "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] 92b6c3d12ba42cedbebf59f76281923d8b8bada42ae03286443786499c783587
[INFO] running `"docker" "start" "-a" "92b6c3d12ba42cedbebf59f76281923d8b8bada42ae03286443786499c783587"`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rust_algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `crate::algorithms::linked_list_stack::ConsumerIter`
[INFO] [stderr]    --> src/algorithms/linked_list_stack.rs:135:9
[INFO] [stderr]     |
[INFO] [stderr] 135 |     use crate::algorithms::linked_list_stack::ConsumerIter;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand::Rng`
[INFO] [stderr]    --> src/algorithms/sorting.rs:313:9
[INFO] [stderr]     |
[INFO] [stderr] 313 |     use rand::Rng;
[INFO] [stderr]     |         ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `val`
[INFO] [stderr]   --> src/algorithms/binary_search_tree.rs:32:17
[INFO] [stderr]    |
[INFO] [stderr] 32 |                 val,
[INFO] [stderr]    |                 ^^^ help: try ignoring the field: `val: _`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `val`
[INFO] [stderr]   --> src/algorithms/binary_search_tree.rs:32:17
[INFO] [stderr]    |
[INFO] [stderr] 32 |                 val,
[INFO] [stderr]    |                 ^^^ help: try ignoring the field: `val: _`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/algorithms/linked_list_queue.rs:166:13
[INFO] [stderr]     |
[INFO] [stderr] 166 |         for i in 0..1000 {
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/algorithms/linked_list_queue.rs:233:13
[INFO] [stderr]     |
[INFO] [stderr] 233 |         for i in 0..25 {
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `BST`
[INFO] [stderr]  --> src/algorithms/binary_search_tree.rs:3:6
[INFO] [stderr]   |
[INFO] [stderr] 3 | enum BST<K, V> {
[INFO] [stderr]   |      ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/algorithms/binary_search_tree.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn new(key: K, val: V) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `put`
[INFO] [stderr]   --> src/algorithms/binary_search_tree.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn put(&mut self, k: K, v: V) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/algorithms/binary_search_tree.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn get(&self, k: K) -> Option<&V> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `CUTOFF` should have a snake case name
[INFO] [stderr]    --> src/algorithms/sorting.rs:125:9
[INFO] [stderr]     |
[INFO] [stderr] 125 |     let CUTOFF = 20;
[INFO] [stderr]     |         ^^^^^^ help: convert the identifier to snake case: `cutoff`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `CUTOFF` should have a snake case name
[INFO] [stderr]    --> src/algorithms/sorting.rs:240:9
[INFO] [stderr]     |
[INFO] [stderr] 240 |     let CUTOFF = 20;
[INFO] [stderr]     |         ^^^^^^ help: convert the identifier to snake case: `cutoff`
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable `CUTOFF` should have a snake case name
[INFO] [stderr]    --> src/algorithms/sorting.rs:125:9
[INFO] [stderr]     |
[INFO] [stderr] 125 |     let CUTOFF = 20;
[INFO] [stderr]     |         ^^^^^^ help: convert the identifier to snake case: `cutoff`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `CUTOFF` should have a snake case name
[INFO] [stderr]    --> src/algorithms/sorting.rs:240:9
[INFO] [stderr]     |
[INFO] [stderr] 240 |     let CUTOFF = 20;
[INFO] [stderr]     |         ^^^^^^ help: convert the identifier to snake case: `cutoff`
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_algorithms::algorithms::array_stack`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use rust_algorithms::algorithms::array_stack;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_algorithms::algorithms::connectivity_quick_find`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use rust_algorithms::algorithms::connectivity_quick_find;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_algorithms::algorithms::connectivity_quick_union`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rust_algorithms::algorithms::connectivity_quick_union;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_algorithms::algorithms::connectivity_quick_union_improved`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use rust_algorithms::algorithms::connectivity_quick_union_improved;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_algorithms::algorithms::linked_list_stack`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rust_algorithms::algorithms::linked_list_stack;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_algorithms::algorithms::array_stack`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use rust_algorithms::algorithms::array_stack;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_algorithms::algorithms::connectivity_quick_find`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use rust_algorithms::algorithms::connectivity_quick_find;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_algorithms::algorithms::connectivity_quick_union`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rust_algorithms::algorithms::connectivity_quick_union;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_algorithms::algorithms::connectivity_quick_union_improved`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use rust_algorithms::algorithms::connectivity_quick_union_improved;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_algorithms::algorithms::linked_list_stack`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rust_algorithms::algorithms::linked_list_stack;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.48s
[INFO] running `"docker" "inspect" "92b6c3d12ba42cedbebf59f76281923d8b8bada42ae03286443786499c783587"`
[INFO] running `"docker" "rm" "-f" "92b6c3d12ba42cedbebf59f76281923d8b8bada42ae03286443786499c783587"`
[INFO] [stdout] 92b6c3d12ba42cedbebf59f76281923d8b8bada42ae03286443786499c783587