[INFO] cloning repository https://github.com/naoppy/Language-processing-100-knocks-by-Rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/naoppy/Language-processing-100-knocks-by-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnaoppy%2FLanguage-processing-100-knocks-by-Rust"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnaoppy%2FLanguage-processing-100-knocks-by-Rust'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d124c0ec942ac01231dfce01eec322922e6f304b
[INFO] checking naoppy/Language-processing-100-knocks-by-Rust against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnaoppy%2FLanguage-processing-100-knocks-by-Rust" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/naoppy/Language-processing-100-knocks-by-Rust on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/naoppy/Language-processing-100-knocks-by-Rust
[INFO] finished tweaking git repo https://github.com/naoppy/Language-processing-100-knocks-by-Rust
[INFO] tweaked toml for git repo https://github.com/naoppy/Language-processing-100-knocks-by-Rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/naoppy/Language-processing-100-knocks-by-Rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "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] c5b372fa74361d0dc63ec8511f56c0b6196f0615855ede9609a5f172e963e6ce
[INFO] running `"docker" "start" "-a" "c5b372fa74361d0dc63ec8511f56c0b6196f0615855ede9609a5f172e963e6ce"`
[INFO] [stderr]     Checking gengo100 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `tab_to_space`
[INFO] [stderr]   --> src/chap2/main.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn tab_to_space(path: &Path, tab_width: usize) -> io::Result<String> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_col`
[INFO] [stderr]   --> src/chap2/main.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn get_col(source: &Path, out: &Path, column_number: usize) -> io::Result<()> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `merge_columns`
[INFO] [stderr]   --> src/chap2/main.rs:57:1
[INFO] [stderr]    |
[INFO] [stderr] 57 | fn merge_columns(source1: &Path, source2: &Path) -> io::Result<String> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `heads`
[INFO] [stderr]   --> src/chap2/main.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | fn heads(path: &Path, n: usize) -> io::Result<String> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tails`
[INFO] [stderr]   --> src/chap2/main.rs:77:1
[INFO] [stderr]    |
[INFO] [stderr] 77 | fn tails(path: &Path, n: usize) -> io::Result<String> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `split_file`
[INFO] [stderr]   --> src/chap2/main.rs:87:1
[INFO] [stderr]    |
[INFO] [stderr] 87 | fn split_file(path: &Path, n: usize) -> io::Result<Vec<String>> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_column_differences`
[INFO] [stderr]   --> src/chap2/main.rs:96:1
[INFO] [stderr]    |
[INFO] [stderr] 96 | fn get_column_differences(path: &Path, n: usize) -> io::Result<HashSet<String>> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sort_by_column`
[INFO] [stderr]    --> src/chap2/main.rs:114:1
[INFO] [stderr]     |
[INFO] [stderr] 114 | fn sort_by_column(path: &Path, n: usize) -> io::Result<Vec<String>> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sort_by_frequency`
[INFO] [stderr]    --> src/chap2/main.rs:126:1
[INFO] [stderr]     |
[INFO] [stderr] 126 | fn sort_by_frequency(path: &Path) -> io::Result<Vec<String>> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tab_to_space`
[INFO] [stderr]   --> src/chap2/main.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn tab_to_space(path: &Path, tab_width: usize) -> io::Result<String> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_col`
[INFO] [stderr]   --> src/chap2/main.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn get_col(source: &Path, out: &Path, column_number: usize) -> io::Result<()> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `merge_columns`
[INFO] [stderr]   --> src/chap2/main.rs:57:1
[INFO] [stderr]    |
[INFO] [stderr] 57 | fn merge_columns(source1: &Path, source2: &Path) -> io::Result<String> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `heads`
[INFO] [stderr]   --> src/chap2/main.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | fn heads(path: &Path, n: usize) -> io::Result<String> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tails`
[INFO] [stderr]   --> src/chap2/main.rs:77:1
[INFO] [stderr]    |
[INFO] [stderr] 77 | fn tails(path: &Path, n: usize) -> io::Result<String> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `split_file`
[INFO] [stderr]   --> src/chap2/main.rs:87:1
[INFO] [stderr]    |
[INFO] [stderr] 87 | fn split_file(path: &Path, n: usize) -> io::Result<Vec<String>> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_column_differences`
[INFO] [stderr]   --> src/chap2/main.rs:96:1
[INFO] [stderr]    |
[INFO] [stderr] 96 | fn get_column_differences(path: &Path, n: usize) -> io::Result<HashSet<String>> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sort_by_column`
[INFO] [stderr]    --> src/chap2/main.rs:114:1
[INFO] [stderr]     |
[INFO] [stderr] 114 | fn sort_by_column(path: &Path, n: usize) -> io::Result<Vec<String>> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sort_by_frequency`
[INFO] [stderr]    --> src/chap2/main.rs:126:1
[INFO] [stderr]     |
[INFO] [stderr] 126 | fn sort_by_frequency(path: &Path) -> io::Result<Vec<String>> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `"docker" "inspect" "c5b372fa74361d0dc63ec8511f56c0b6196f0615855ede9609a5f172e963e6ce"`
[INFO] running `"docker" "rm" "-f" "c5b372fa74361d0dc63ec8511f56c0b6196f0615855ede9609a5f172e963e6ce"`
[INFO] [stdout] c5b372fa74361d0dc63ec8511f56c0b6196f0615855ede9609a5f172e963e6ce