Dec 17 15:26:59.482 INFO checking sikinmettugi/wordfreq-rs against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 15:26:59.482 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/sikinmettugi/wordfreq-rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 15:26:59.925 INFO [stdout] 370c02c3cabcc56d9270b6b49b0287f66de139c274003a7a5805ed898255c247
Dec 17 15:26:59.927 INFO running `"docker" "start" "-a" "370c02c3cabcc56d9270b6b49b0287f66de139c274003a7a5805ed898255c247"`
Dec 17 15:27:01.456 INFO [stderr]     Checking wordfreq-rs v0.1.0 (/opt/crater/workdir)
Dec 17 15:27:01.694 INFO [stderr] warning: struct is never constructed: `WordCount`
Dec 17 15:27:01.696 INFO [stderr]   --> src/main.rs:13:1
Dec 17 15:27:01.696 INFO [stderr]    |
Dec 17 15:27:01.696 INFO [stderr] 13 | struct WordCount {
Dec 17 15:27:01.696 INFO [stderr]    | ^^^^^^^^^^^^^^^^
Dec 17 15:27:01.696 INFO [stderr]    |
Dec 17 15:27:01.696 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 15:27:01.696 INFO [stderr] 
Dec 17 15:27:01.696 INFO [stderr] warning: method is never used: `get_count`
Dec 17 15:27:01.696 INFO [stderr]   --> src/main.rs:19:5
Dec 17 15:27:01.696 INFO [stderr]    |
Dec 17 15:27:01.696 INFO [stderr] 19 |     fn get_count(&self) -> u32 {
Dec 17 15:27:01.696 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:27:01.696 INFO [stderr] 
Dec 17 15:27:01.696 INFO [stderr] warning: method is never used: `increment`
Dec 17 15:27:01.696 INFO [stderr]   --> src/main.rs:23:5
Dec 17 15:27:01.696 INFO [stderr]    |
Dec 17 15:27:01.696 INFO [stderr] 23 |     fn increment(&mut self) {
Dec 17 15:27:01.696 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:27:01.696 INFO [stderr] 
Dec 17 15:27:01.824 INFO [stderr] warning: struct is never constructed: `WordCount`
Dec 17 15:27:01.824 INFO [stderr]   --> src/main.rs:13:1
Dec 17 15:27:01.824 INFO [stderr]    |
Dec 17 15:27:01.824 INFO [stderr] 13 | struct WordCount {
Dec 17 15:27:01.824 INFO [stderr]    | ^^^^^^^^^^^^^^^^
Dec 17 15:27:01.824 INFO [stderr]    |
Dec 17 15:27:01.824 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 15:27:01.824 INFO [stderr] 
Dec 17 15:27:01.824 INFO [stderr] warning: method is never used: `get_count`
Dec 17 15:27:01.824 INFO [stderr]   --> src/main.rs:19:5
Dec 17 15:27:01.824 INFO [stderr]    |
Dec 17 15:27:01.824 INFO [stderr] 19 |     fn get_count(&self) -> u32 {
Dec 17 15:27:01.824 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:27:01.824 INFO [stderr] 
Dec 17 15:27:01.824 INFO [stderr] warning: method is never used: `increment`
Dec 17 15:27:01.824 INFO [stderr]   --> src/main.rs:23:5
Dec 17 15:27:01.824 INFO [stderr]    |
Dec 17 15:27:01.824 INFO [stderr] 23 |     fn increment(&mut self) {
Dec 17 15:27:01.824 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:27:01.824 INFO [stderr] 
Dec 17 15:27:01.849 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
Dec 17 15:27:02.424 INFO running `"docker" "inspect" "370c02c3cabcc56d9270b6b49b0287f66de139c274003a7a5805ed898255c247"`
Dec 17 15:27:02.624 INFO running `"docker" "rm" "-f" "370c02c3cabcc56d9270b6b49b0287f66de139c274003a7a5805ed898255c247"`
Dec 17 15:27:02.843 INFO [stdout] 370c02c3cabcc56d9270b6b49b0287f66de139c274003a7a5805ed898255c247