Dec 17 12:40:26.469 INFO checking varzac/rust_collections against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 12:40:26.469 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/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 12:40:26.904 INFO [stdout] c9868d31919ac5aee5f8a8202fc2e895244c03ee6a310fada4a6c18ed67139d8
Dec 17 12:40:26.912 INFO running `"docker" "start" "-a" "c9868d31919ac5aee5f8a8202fc2e895244c03ee6a310fada4a6c18ed67139d8"`
Dec 17 12:40:28.795 INFO [stderr] warning: path `/opt/crater/workdir/src/linked_list.rs` was erroneously implicitly accepted for binary `linked_list`,
Dec 17 12:40:28.795 INFO [stderr] please set bin.path in Cargo.toml
Dec 17 12:40:28.795 INFO [stderr]     Checking linked_list v0.0.1 (/opt/crater/workdir)
Dec 17 12:40:29.096 INFO [stderr] warning: method is never used: `delete_val`
Dec 17 12:40:29.096 INFO [stderr]   --> src/linked_list.rs:14:5
Dec 17 12:40:29.096 INFO [stderr]    |
Dec 17 12:40:29.096 INFO [stderr] 14 |     fn delete_val(&self, val: &T) -> Option<Rc<LinkedList<T>>> {
Dec 17 12:40:29.096 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:40:29.096 INFO [stderr]    |
Dec 17 12:40:29.096 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 12:40:29.096 INFO [stderr] 
Dec 17 12:40:29.096 INFO [stderr] warning: method is never used: `insert_val`
Dec 17 12:40:29.096 INFO [stderr]   --> src/linked_list.rs:38:5
Dec 17 12:40:29.096 INFO [stderr]    |
Dec 17 12:40:29.096 INFO [stderr] 38 |     fn insert_val(&self, val: T) -> LinkedList<T> {
Dec 17 12:40:29.096 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:40:29.096 INFO [stderr] 
Dec 17 12:40:29.096 INFO [stderr] warning: method is never used: `length`
Dec 17 12:40:29.098 INFO [stderr]   --> src/linked_list.rs:42:5
Dec 17 12:40:29.098 INFO [stderr]    |
Dec 17 12:40:29.098 INFO [stderr] 42 |     fn length(&self) -> i32 {
Dec 17 12:40:29.098 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:40:29.098 INFO [stderr] 
Dec 17 12:40:29.098 INFO [stderr] warning: method is never used: `find`
Dec 17 12:40:29.098 INFO [stderr]   --> src/linked_list.rs:66:5
Dec 17 12:40:29.098 INFO [stderr]    |
Dec 17 12:40:29.098 INFO [stderr] 66 |     fn find(&self, val: T) -> Option<i32> {
Dec 17 12:40:29.098 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:40:29.098 INFO [stderr] 
Dec 17 12:40:29.140 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.37s
Dec 17 12:40:29.780 INFO running `"docker" "inspect" "c9868d31919ac5aee5f8a8202fc2e895244c03ee6a310fada4a6c18ed67139d8"`
Dec 17 12:40:30.022 INFO running `"docker" "rm" "-f" "c9868d31919ac5aee5f8a8202fc2e895244c03ee6a310fada4a6c18ed67139d8"`
Dec 17 12:40:30.340 INFO [stdout] c9868d31919ac5aee5f8a8202fc2e895244c03ee6a310fada4a6c18ed67139d8