Dec 19 06:14:04.213 INFO checking varzac/rust_collections against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 06:14:04.213 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/varzac/rust_collections:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 06:14:04.698 INFO [stdout] 83248e98c71f32683249a9b91e99900a795c177324697e55c6b83b1debfe36a9
Dec 19 06:14:04.706 INFO running `"docker" "start" "-a" "83248e98c71f32683249a9b91e99900a795c177324697e55c6b83b1debfe36a9"`
Dec 19 06:14:06.221 INFO [stderr] warning: path `/opt/crater/workdir/src/linked_list.rs` was erroneously implicitly accepted for binary `linked_list`,
Dec 19 06:14:06.221 INFO [stderr] please set bin.path in Cargo.toml
Dec 19 06:14:06.221 INFO [stderr]     Checking linked_list v0.0.1 (/opt/crater/workdir)
Dec 19 06:14:06.469 INFO [stderr] warning: method is never used: `delete_val`
Dec 19 06:14:06.469 INFO [stderr]   --> src/linked_list.rs:14:5
Dec 19 06:14:06.469 INFO [stderr]    |
Dec 19 06:14:06.469 INFO [stderr] 14 |     fn delete_val(&self, val: &T) -> Option<Rc<LinkedList<T>>> {
Dec 19 06:14:06.469 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 06:14:06.469 INFO [stderr]    |
Dec 19 06:14:06.469 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 06:14:06.469 INFO [stderr] 
Dec 19 06:14:06.469 INFO [stderr] warning: method is never used: `insert_val`
Dec 19 06:14:06.469 INFO [stderr]   --> src/linked_list.rs:38:5
Dec 19 06:14:06.469 INFO [stderr]    |
Dec 19 06:14:06.469 INFO [stderr] 38 |     fn insert_val(&self, val: T) -> LinkedList<T> {
Dec 19 06:14:06.469 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 06:14:06.469 INFO [stderr] 
Dec 19 06:14:06.469 INFO [stderr] warning: method is never used: `length`
Dec 19 06:14:06.469 INFO [stderr]   --> src/linked_list.rs:42:5
Dec 19 06:14:06.469 INFO [stderr]    |
Dec 19 06:14:06.469 INFO [stderr] 42 |     fn length(&self) -> i32 {
Dec 19 06:14:06.470 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 06:14:06.470 INFO [stderr] 
Dec 19 06:14:06.470 INFO [stderr] warning: method is never used: `find`
Dec 19 06:14:06.470 INFO [stderr]   --> src/linked_list.rs:66:5
Dec 19 06:14:06.470 INFO [stderr]    |
Dec 19 06:14:06.470 INFO [stderr] 66 |     fn find(&self, val: T) -> Option<i32> {
Dec 19 06:14:06.470 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 06:14:06.470 INFO [stderr] 
Dec 19 06:14:06.682 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
Dec 19 06:14:07.478 INFO running `"docker" "inspect" "83248e98c71f32683249a9b91e99900a795c177324697e55c6b83b1debfe36a9"`
Dec 19 06:14:07.836 INFO running `"docker" "rm" "-f" "83248e98c71f32683249a9b91e99900a795c177324697e55c6b83b1debfe36a9"`
Dec 19 06:14:08.105 INFO [stdout] 83248e98c71f32683249a9b91e99900a795c177324697e55c6b83b1debfe36a9