Dec 19 10:27:41.905 INFO checking raiker/persistent-rope against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 10:27:41.905 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 10:27:42.195 INFO [stdout] 74ba7e37fe2b8e54d3a76cf8f0c0d77365b0dd112c3e68b6603eb2f093ed38d5
Dec 19 10:27:42.227 INFO running `"docker" "start" "-a" "74ba7e37fe2b8e54d3a76cf8f0c0d77365b0dd112c3e68b6603eb2f093ed38d5"`
Dec 19 10:27:43.069 INFO [stderr]     Checking persistent-rope v0.1.0 (/opt/crater/workdir)
Dec 19 10:27:43.354 INFO [stderr] warning: unused variable: `parent`
Dec 19 10:27:43.354 INFO [stderr]    --> src/main.rs:141:69
Dec 19 10:27:43.354 INFO [stderr]     |
Dec 19 10:27:43.354 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 10:27:43.354 INFO [stderr]     |                                                                        ^^^^^^ help: consider using `_parent` instead
Dec 19 10:27:43.354 INFO [stderr]     |
Dec 19 10:27:43.354 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 10:27:43.354 INFO [stderr] 
Dec 19 10:27:43.364 INFO [stderr] warning: struct is never constructed: `RcSliceableString`
Dec 19 10:27:43.364 INFO [stderr]  --> src/rcstr.rs:3:1
Dec 19 10:27:43.364 INFO [stderr]   |
Dec 19 10:27:43.364 INFO [stderr] 3 | pub struct RcSliceableString {
Dec 19 10:27:43.364 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:27:43.364 INFO [stderr]   |
Dec 19 10:27:43.364 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 10:27:43.364 INFO [stderr] 
Dec 19 10:27:43.364 INFO [stderr] warning: method is never used: `new`
Dec 19 10:27:43.364 INFO [stderr]   --> src/rcstr.rs:10:2
Dec 19 10:27:43.364 INFO [stderr]    |
Dec 19 10:27:43.365 INFO [stderr] 10 |     pub fn new(s: String) -> RcSliceableString {
Dec 19 10:27:43.365 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:27:43.365 INFO [stderr] 
Dec 19 10:27:43.365 INFO [stderr] warning: method is never used: `slice`
Dec 19 10:27:43.365 INFO [stderr]   --> src/rcstr.rs:19:2
Dec 19 10:27:43.365 INFO [stderr]    |
Dec 19 10:27:43.365 INFO [stderr] 19 |     pub fn slice(&self, start: usize, len: usize) -> RcSliceableString {
Dec 19 10:27:43.365 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:27:43.365 INFO [stderr] 
Dec 19 10:27:43.365 INFO [stderr] warning: method is never used: `as_str`
Dec 19 10:27:43.365 INFO [stderr]   --> src/rcstr.rs:34:2
Dec 19 10:27:43.365 INFO [stderr]    |
Dec 19 10:27:43.365 INFO [stderr] 34 |     pub fn as_str(&self) -> &str {
Dec 19 10:27:43.365 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:27:43.365 INFO [stderr] 
Dec 19 10:27:43.776 INFO [stderr] warning: unused variable: `parent`
Dec 19 10:27:43.776 INFO [stderr]    --> src/main.rs:141:69
Dec 19 10:27:43.776 INFO [stderr]     |
Dec 19 10:27:43.776 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 10:27:43.776 INFO [stderr]     |                                                                        ^^^^^^ help: consider using `_parent` instead
Dec 19 10:27:43.776 INFO [stderr]     |
Dec 19 10:27:43.776 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 10:27:43.776 INFO [stderr] 
Dec 19 10:27:43.925 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
Dec 19 10:27:44.216 INFO running `"docker" "inspect" "74ba7e37fe2b8e54d3a76cf8f0c0d77365b0dd112c3e68b6603eb2f093ed38d5"`
Dec 19 10:27:44.284 INFO running `"docker" "rm" "-f" "74ba7e37fe2b8e54d3a76cf8f0c0d77365b0dd112c3e68b6603eb2f093ed38d5"`
Dec 19 10:27:44.498 INFO [stdout] 74ba7e37fe2b8e54d3a76cf8f0c0d77365b0dd112c3e68b6603eb2f093ed38d5