[INFO] cloning repository https://github.com/jakyle/rust-algos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakyle/rust-algos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakyle%2Frust-algos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakyle%2Frust-algos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7865320dda33ff4b52d9e4472ecdcffc002023bf
[INFO] checking jakyle/rust-algos against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakyle%2Frust-algos" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jakyle/rust-algos on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jakyle/rust-algos
[INFO] finished tweaking git repo https://github.com/jakyle/rust-algos
[INFO] tweaked toml for git repo https://github.com/jakyle/rust-algos written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/jakyle/rust-algos already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", 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] 14899eaac4545f79f021076a1c65696d52449aeddf3b79181b2880af1fa480a3
[INFO] running `Command { std: "docker" "start" "-a" "14899eaac4545f79f021076a1c65696d52449aeddf3b79181b2880af1fa480a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14899eaac4545f79f021076a1c65696d52449aeddf3b79181b2880af1fa480a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14899eaac4545f79f021076a1c65696d52449aeddf3b79181b2880af1fa480a3", kill_on_drop: false }`
[INFO] [stdout] 14899eaac4545f79f021076a1c65696d52449aeddf3b79181b2880af1fa480a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8d84581cea18ae3463a56b2281b154533a10e7f3ec1456bd0f63b726f9e639b
[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" "b8d84581cea18ae3463a56b2281b154533a10e7f3ec1456bd0f63b726f9e639b", kill_on_drop: false }`
[INFO] [stderr]     Checking algos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `is_braces_balanced`
[INFO] [stdout]  --> src/balanced_braces.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn is_braces_balanced(braces: &str) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `max_number_of_balloons`
[INFO] [stdout]  --> src/number_of_baloons.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn max_number_of_balloons(s: String) -> i32 {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `two_sum`
[INFO] [stdout]  --> src/two_sum.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reverse`
[INFO] [stdout]  --> src/reverse_integer.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn reverse(x: i32) -> i32 {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `find_numbers`
[INFO] [stdout]  --> src/find_numbers_with_even_digits.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn find_numbers(x: Vec<i32>) -> i32 {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `find_kth_largest`
[INFO] [stdout]  --> src/find_kth_largest.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn find_kth_largest(nums: Vec<i32>, k: i32) -> i32 {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `top_k_frequent`
[INFO] [stdout]  --> src/top_k_frequent_elements.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn top_k_frequent(nums: Vec<i32>, k: i32) -> Vec<i32> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `Command { std: "docker" "inspect" "b8d84581cea18ae3463a56b2281b154533a10e7f3ec1456bd0f63b726f9e639b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8d84581cea18ae3463a56b2281b154533a10e7f3ec1456bd0f63b726f9e639b", kill_on_drop: false }`
[INFO] [stdout] b8d84581cea18ae3463a56b2281b154533a10e7f3ec1456bd0f63b726f9e639b