[INFO] updating cached repository https://github.com/yminachi/rust-katas
[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] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4ac6afe057837b7d9b77176fc5f18648bfd8ddb3
[INFO] checking yminachi/rust-katas against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyminachi%2Frust-katas" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yminachi/rust-katas on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-12/source/Cargo.toml
[INFO] crate git repo https://github.com/yminachi/rust-katas already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] faf1cb9f4af12b470d187a50029bd67e79954f8e8ce9fbdb814de6e06950b4c4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "faf1cb9f4af12b470d187a50029bd67e79954f8e8ce9fbdb814de6e06950b4c4"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking rust-katas v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: field is never read: `hourly_rate`
[INFO] [stderr]  --> src/babysitter.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     hourly_rate: u32,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `hour_rate_ends`
[INFO] [stderr]  --> src/babysitter.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     hour_rate_ends: u32
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `calculate_total_sitter_payment`
[INFO] [stderr]   --> src/babysitter.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn calculate_total_sitter_payment(start_time: u32, end_time: u32, rates: &[Rate]) -> u32 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sort_rates_by_end_time`
[INFO] [stderr]   --> src/babysitter.rs:30:4
[INFO] [stderr]    |
[INFO] [stderr] 30 | fn sort_rates_by_end_time(rates: &[Rate]) -> Vec<Rate> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hour_including_next_day`
[INFO] [stderr]   --> src/babysitter.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn hour_including_next_day(hour: u32) -> u32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `validate_rate_coverage`
[INFO] [stderr]   --> src/babysitter.rs:45:4
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn validate_rate_coverage(current_hour: u32, effective_end_time: u32) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `validate_start_end_times`
[INFO] [stderr]   --> src/babysitter.rs:51:4
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn validate_start_end_times(start_time: u32, end_time: u32) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pencil`
[INFO] [stderr]  --> src/pencil.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Pencil {
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/pencil.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn new(max_durability: u32, length: u32, eraser_durability: u32) -> Pencil {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `write`
[INFO] [stderr]   --> src/pencil.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn write(&mut self, string: String) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sharpen`
[INFO] [stderr]   --> src/pencil.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn sharpen(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `erase`
[INFO] [stderr]   --> src/pencil.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn erase(&mut self, word: String) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "faf1cb9f4af12b470d187a50029bd67e79954f8e8ce9fbdb814de6e06950b4c4"`
[INFO] running `"docker" "rm" "-f" "faf1cb9f4af12b470d187a50029bd67e79954f8e8ce9fbdb814de6e06950b4c4"`
[INFO] [stdout] faf1cb9f4af12b470d187a50029bd67e79954f8e8ce9fbdb814de6e06950b4c4