[INFO] cloning repository https://github.com/yminachi/rust-katas
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yminachi/rust-katas" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyminachi%2Frust-katas", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyminachi%2Frust-katas'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4ac6afe057837b7d9b77176fc5f18648bfd8ddb3
[INFO] checking yminachi/rust-katas against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyminachi%2Frust-katas" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yminachi/rust-katas 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/yminachi/rust-katas
[INFO] finished tweaking git repo https://github.com/yminachi/rust-katas
[INFO] tweaked toml for git repo https://github.com/yminachi/rust-katas written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/yminachi/rust-katas 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 8ce8d2ebb590f8b570a693bb5ac70921ef5d24c54f6584569df3feec6da2c287
[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" "8ce8d2ebb590f8b570a693bb5ac70921ef5d24c54f6584569df3feec6da2c287", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ce8d2ebb590f8b570a693bb5ac70921ef5d24c54f6584569df3feec6da2c287", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ce8d2ebb590f8b570a693bb5ac70921ef5d24c54f6584569df3feec6da2c287", kill_on_drop: false }`
[INFO] [stdout] 8ce8d2ebb590f8b570a693bb5ac70921ef5d24c54f6584569df3feec6da2c287
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] [stdout] 08c7bcac8504baa2fda35dcbd44821817d138e6d199e5e464af4103e4ad86948
[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" "08c7bcac8504baa2fda35dcbd44821817d138e6d199e5e464af4103e4ad86948", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-katas v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `hourly_rate`
[INFO] [stdout]  --> src/babysitter.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     hourly_rate: u32,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `hour_rate_ends`
[INFO] [stdout]  --> src/babysitter.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     hour_rate_ends: u32
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculate_total_sitter_payment`
[INFO] [stdout]   --> src/babysitter.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn calculate_total_sitter_payment(start_time: u32, end_time: u32, rates: &[Rate]) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sort_rates_by_end_time`
[INFO] [stdout]   --> src/babysitter.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn sort_rates_by_end_time(rates: &[Rate]) -> Vec<Rate> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hour_including_next_day`
[INFO] [stdout]   --> src/babysitter.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn hour_including_next_day(hour: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `validate_rate_coverage`
[INFO] [stdout]   --> src/babysitter.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn validate_rate_coverage(current_hour: u32, effective_end_time: u32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `validate_start_end_times`
[INFO] [stdout]   --> src/babysitter.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn validate_start_end_times(start_time: u32, end_time: u32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Pencil`
[INFO] [stdout]  --> src/pencil.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Pencil {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/pencil.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new(max_durability: u32, length: u32, eraser_durability: u32) -> Pencil {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write`
[INFO] [stdout]   --> src/pencil.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn write(&mut self, string: String) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sharpen`
[INFO] [stdout]   --> src/pencil.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn sharpen(&mut self) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `erase`
[INFO] [stdout]   --> src/pencil.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn erase(&mut self, word: String) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "08c7bcac8504baa2fda35dcbd44821817d138e6d199e5e464af4103e4ad86948", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08c7bcac8504baa2fda35dcbd44821817d138e6d199e5e464af4103e4ad86948", kill_on_drop: false }`
[INFO] [stdout] 08c7bcac8504baa2fda35dcbd44821817d138e6d199e5e464af4103e4ad86948