Dec 19 16:52:52.584 INFO checking fneddy/rat12 against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 16:52:52.585 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/fneddy/rat12:/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 16:52:53.195 INFO [stdout] ef7fac46bb736f254b1d66e8cf6c571875c1da452cb2d635ebae88e1b80572dd
Dec 19 16:52:53.198 INFO running `"docker" "start" "-a" "ef7fac46bb736f254b1d66e8cf6c571875c1da452cb2d635ebae88e1b80572dd"`
Dec 19 16:52:54.708 INFO [stderr]     Checking rat12 v0.1.0 (/opt/crater/workdir)
Dec 19 16:52:55.296 INFO [stderr] warning: unused variable: `buf`
Dec 19 16:52:55.296 INFO [stderr]   --> src/cluster.rs:60:25
Dec 19 16:52:55.296 INFO [stderr]    |
Dec 19 16:52:55.296 INFO [stderr] 60 |     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
Dec 19 16:52:55.296 INFO [stderr]    |                         ^^^ help: consider using `_buf` instead
Dec 19 16:52:55.296 INFO [stderr]    |
Dec 19 16:52:55.296 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 16:52:55.296 INFO [stderr] 
Dec 19 16:52:55.388 INFO [stderr] warning: variable does not need to be mutable
Dec 19 16:52:55.388 INFO [stderr]   --> src/cluster.rs:31:16
Dec 19 16:52:55.388 INFO [stderr]    |
Dec 19 16:52:55.388 INFO [stderr] 31 |     pub fn new(mut descriptor: Arc<RwLock<T>>,
Dec 19 16:52:55.388 INFO [stderr]    |                ----^^^^^^^^^^
Dec 19 16:52:55.388 INFO [stderr]    |                |
Dec 19 16:52:55.388 INFO [stderr]    |                help: remove this `mut`
Dec 19 16:52:55.388 INFO [stderr]    |
Dec 19 16:52:55.388 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 16:52:55.388 INFO [stderr] 
Dec 19 16:52:55.412 INFO [stderr] warning: unused variable: `buf`
Dec 19 16:52:55.412 INFO [stderr]   --> src/cluster.rs:60:25
Dec 19 16:52:55.412 INFO [stderr]    |
Dec 19 16:52:55.412 INFO [stderr] 60 |     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
Dec 19 16:52:55.412 INFO [stderr]    |                         ^^^ help: consider using `_buf` instead
Dec 19 16:52:55.412 INFO [stderr]    |
Dec 19 16:52:55.412 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 16:52:55.412 INFO [stderr] 
Dec 19 16:52:55.492 INFO [stderr] warning: variable does not need to be mutable
Dec 19 16:52:55.492 INFO [stderr]   --> src/cluster.rs:31:16
Dec 19 16:52:55.492 INFO [stderr]    |
Dec 19 16:52:55.492 INFO [stderr] 31 |     pub fn new(mut descriptor: Arc<RwLock<T>>,
Dec 19 16:52:55.492 INFO [stderr]    |                ----^^^^^^^^^^
Dec 19 16:52:55.492 INFO [stderr]    |                |
Dec 19 16:52:55.492 INFO [stderr]    |                help: remove this `mut`
Dec 19 16:52:55.492 INFO [stderr]    |
Dec 19 16:52:55.492 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 16:52:55.492 INFO [stderr] 
Dec 19 16:52:56.020 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.35s
Dec 19 16:52:56.768 INFO running `"docker" "inspect" "ef7fac46bb736f254b1d66e8cf6c571875c1da452cb2d635ebae88e1b80572dd"`
Dec 19 16:52:57.060 INFO running `"docker" "rm" "-f" "ef7fac46bb736f254b1d66e8cf6c571875c1da452cb2d635ebae88e1b80572dd"`
Dec 19 16:52:57.444 INFO [stdout] ef7fac46bb736f254b1d66e8cf6c571875c1da452cb2d635ebae88e1b80572dd