Dec 19 10:27:37.565 INFO checking raiker/persistent-rope against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 10:27:37.565 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/raiker/persistent-rope:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 10:27:38.004 INFO [stdout] f9e9fe8a587a36acd8cfe1c371ce8e161125531cd06a3ec8b647ce9aee713e3d
Dec 19 10:27:38.006 INFO running `"docker" "start" "-a" "f9e9fe8a587a36acd8cfe1c371ce8e161125531cd06a3ec8b647ce9aee713e3d"`
Dec 19 10:27:40.099 INFO [stderr]     Checking persistent-rope v0.1.0 (/opt/crater/workdir)
Dec 19 10:27:40.446 INFO [stderr] warning: unused variable: `parent`
Dec 19 10:27:40.446 INFO [stderr]    --> src/main.rs:141:69
Dec 19 10:27:40.446 INFO [stderr]     |
Dec 19 10:27:40.446 INFO [stderr] 141 |     fn rec_insert(key: K, val: V, current: &Rc<Option<TreeNode<K,V>>>, parent: Option<&Rc<Option<TreeNode<K,V>>>>) -> InsertionResultRecursion<K,V>{
Dec 19 10:27:40.446 INFO [stderr]     |                                                                        ^^^^^^ help: consider using `_parent` instead
Dec 19 10:27:40.446 INFO [stderr]     |
Dec 19 10:27:40.446 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 10:27:40.446 INFO [stderr] 
Dec 19 10:27:40.474 INFO [stderr] warning: struct is never constructed: `RcSliceableString`
Dec 19 10:27:40.475 INFO [stderr]  --> src/rcstr.rs:3:1
Dec 19 10:27:40.475 INFO [stderr]   |
Dec 19 10:27:40.475 INFO [stderr] 3 | pub struct RcSliceableString {
Dec 19 10:27:40.475 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:27:40.475 INFO [stderr]   |
Dec 19 10:27:40.475 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 10:27:40.475 INFO [stderr] 
Dec 19 10:27:40.475 INFO [stderr] warning: method is never used: `new`
Dec 19 10:27:40.475 INFO [stderr]   --> src/rcstr.rs:10:2
Dec 19 10:27:40.475 INFO [stderr]    |
Dec 19 10:27:40.475 INFO [stderr] 10 |     pub fn new(s: String) -> RcSliceableString {
Dec 19 10:27:40.475 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:27:40.475 INFO [stderr] 
Dec 19 10:27:40.475 INFO [stderr] warning: method is never used: `slice`
Dec 19 10:27:40.475 INFO [stderr]   --> src/rcstr.rs:19:2
Dec 19 10:27:40.475 INFO [stderr]    |
Dec 19 10:27:40.476 INFO [stderr] 19 |     pub fn slice(&self, start: usize, len: usize) -> RcSliceableString {
Dec 19 10:27:40.476 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:27:40.476 INFO [stderr] 
Dec 19 10:27:40.476 INFO [stderr] warning: method is never used: `as_str`
Dec 19 10:27:40.476 INFO [stderr]   --> src/rcstr.rs:34:2
Dec 19 10:27:40.476 INFO [stderr]    |
Dec 19 10:27:40.476 INFO [stderr] 34 |     pub fn as_str(&self) -> &str {
Dec 19 10:27:40.476 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:27:40.476 INFO [stderr] 
Dec 19 10:27:40.888 INFO [stderr] warning: unused variable: `parent`
Dec 19 10:27:40.888 INFO [stderr]    --> src/main.rs:141:69
Dec 19 10:27:40.888 INFO [stderr]     |
Dec 19 10:27:40.888 INFO [stderr] 141 |     fn rec_insert(key: K, val: V, current: &Rc<Option<TreeNode<K,V>>>, parent: Option<&Rc<Option<TreeNode<K,V>>>>) -> InsertionResultRecursion<K,V>{
Dec 19 10:27:40.888 INFO [stderr]     |                                                                        ^^^^^^ help: consider using `_parent` instead
Dec 19 10:27:40.888 INFO [stderr]     |
Dec 19 10:27:40.888 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 10:27:40.888 INFO [stderr] 
Dec 19 10:27:41.092 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
Dec 19 10:27:41.728 INFO running `"docker" "inspect" "f9e9fe8a587a36acd8cfe1c371ce8e161125531cd06a3ec8b647ce9aee713e3d"`
Dec 19 10:27:41.865 INFO running `"docker" "rm" "-f" "f9e9fe8a587a36acd8cfe1c371ce8e161125531cd06a3ec8b647ce9aee713e3d"`
Dec 19 10:27:41.996 INFO [stdout] f9e9fe8a587a36acd8cfe1c371ce8e161125531cd06a3ec8b647ce9aee713e3d