[INFO] cloning repository naoppy/Language-processing-100-knocks-by-Rust
[INFO] running `"git" "clone" "--bare" "git://github.com/naoppy/Language-processing-100-knocks-by-Rust.git" "work/cache/sources/gh/naoppy/Language-processing-100-knocks-by-Rust"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/naoppy/Language-processing-100-knocks-by-Rust'...
[INFO] running `"git" "clone" "work/cache/sources/gh/naoppy/Language-processing-100-knocks-by-Rust" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/naoppy/Language-processing-100-knocks-by-Rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/naoppy/Language-processing-100-knocks-by-Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/naoppy/Language-processing-100-knocks-by-Rust" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/naoppy/Language-processing-100-knocks-by-Rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/naoppy/Language-processing-100-knocks-by-Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d124c0ec942ac01231dfce01eec322922e6f304b
[INFO] sha for GitHub repo naoppy/Language-processing-100-knocks-by-Rust: d124c0ec942ac01231dfce01eec322922e6f304b
[INFO] validating manifest of naoppy/Language-processing-100-knocks-by-Rust on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of naoppy/Language-processing-100-knocks-by-Rust on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing naoppy/Language-processing-100-knocks-by-Rust
[INFO] finished frobbing naoppy/Language-processing-100-knocks-by-Rust
[INFO] frobbed toml for naoppy/Language-processing-100-knocks-by-Rust written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/naoppy/Language-processing-100-knocks-by-Rust/Cargo.toml
[INFO] started frobbing naoppy/Language-processing-100-knocks-by-Rust
[INFO] finished frobbing naoppy/Language-processing-100-knocks-by-Rust
[INFO] frobbed toml for naoppy/Language-processing-100-knocks-by-Rust written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/naoppy/Language-processing-100-knocks-by-Rust/Cargo.toml
[INFO] crate naoppy/Language-processing-100-knocks-by-Rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking naoppy/Language-processing-100-knocks-by-Rust against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-2/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/naoppy/Language-processing-100-knocks-by-Rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 84b71dc85b1da9c6bcb374816dfff6f61d03390c651cc4f3b8695ba06fc89221
[INFO] running `"docker" "start" "-a" "84b71dc85b1da9c6bcb374816dfff6f61d03390c651cc4f3b8695ba06fc89221"`
[INFO] [stderr]     Checking gengo100 v0.1.0 (/opt/crater/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 1.03s
[INFO] running `"docker" "inspect" "84b71dc85b1da9c6bcb374816dfff6f61d03390c651cc4f3b8695ba06fc89221"`
[INFO] running `"docker" "rm" "-f" "84b71dc85b1da9c6bcb374816dfff6f61d03390c651cc4f3b8695ba06fc89221"`
[INFO] [stdout] 84b71dc85b1da9c6bcb374816dfff6f61d03390c651cc4f3b8695ba06fc89221