Dec 19 13:47:51.404 INFO checking lbrande/red-black-tree against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 13:47:51.422 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/lbrande/red-black-tree:/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 13:47:51.616 INFO [stdout] 14da62e7d707e384dee5a55ffb0c4b774fc5c6063bc18aaf42f9625623656f7d
Dec 19 13:47:51.617 INFO running `"docker" "start" "-a" "14da62e7d707e384dee5a55ffb0c4b774fc5c6063bc18aaf42f9625623656f7d"`
Dec 19 13:47:52.203 INFO [stderr]     Checking red-black-tree v0.1.0 (/opt/crater/workdir)
Dec 19 13:47:52.380 INFO [stderr] warning: field is never used: `parent`
Dec 19 13:47:52.380 INFO [stderr]   --> src/lib.rs:36:5
Dec 19 13:47:52.380 INFO [stderr]    |
Dec 19 13:47:52.380 INFO [stderr] 36 |     parent: RefCell<Weak<RedBlackNode<T>>>,
Dec 19 13:47:52.380 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:47:52.380 INFO [stderr]    |
Dec 19 13:47:52.380 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 13:47:52.380 INFO [stderr] 
Dec 19 13:47:52.380 INFO [stderr] warning: field is never used: `red`
Dec 19 13:47:52.380 INFO [stderr]   --> src/lib.rs:39:5
Dec 19 13:47:52.380 INFO [stderr]    |
Dec 19 13:47:52.380 INFO [stderr] 39 |     red: bool,
Dec 19 13:47:52.380 INFO [stderr]    |     ^^^^^^^^^
Dec 19 13:47:52.380 INFO [stderr] 
Dec 19 13:47:52.380 INFO [stderr] warning: method is never used: `grandparent`
Dec 19 13:47:52.380 INFO [stderr]   --> src/lib.rs:96:5
Dec 19 13:47:52.380 INFO [stderr]    |
Dec 19 13:47:52.380 INFO [stderr] 96 |     fn grandparent(&self) -> Weak<RedBlackNode<T>> {
Dec 19 13:47:52.380 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:47:52.380 INFO [stderr] 
Dec 19 13:47:52.380 INFO [stderr] warning: method is never used: `uncle`
Dec 19 13:47:52.380 INFO [stderr]    --> src/lib.rs:106:5
Dec 19 13:47:52.380 INFO [stderr]     |
Dec 19 13:47:52.380 INFO [stderr] 106 |     fn uncle(&self) -> Weak<RedBlackNode<T>> {
Dec 19 13:47:52.380 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:47:52.380 INFO [stderr] 
Dec 19 13:47:52.414 INFO [stderr] warning: field is never used: `parent`
Dec 19 13:47:52.414 INFO [stderr]   --> src/lib.rs:36:5
Dec 19 13:47:52.414 INFO [stderr]    |
Dec 19 13:47:52.414 INFO [stderr] 36 |     parent: RefCell<Weak<RedBlackNode<T>>>,
Dec 19 13:47:52.414 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:47:52.415 INFO [stderr]    |
Dec 19 13:47:52.415 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 13:47:52.415 INFO [stderr] 
Dec 19 13:47:52.415 INFO [stderr] warning: field is never used: `red`
Dec 19 13:47:52.415 INFO [stderr]   --> src/lib.rs:39:5
Dec 19 13:47:52.415 INFO [stderr]    |
Dec 19 13:47:52.415 INFO [stderr] 39 |     red: bool,
Dec 19 13:47:52.415 INFO [stderr]    |     ^^^^^^^^^
Dec 19 13:47:52.415 INFO [stderr] 
Dec 19 13:47:52.415 INFO [stderr] warning: method is never used: `grandparent`
Dec 19 13:47:52.415 INFO [stderr]   --> src/lib.rs:96:5
Dec 19 13:47:52.415 INFO [stderr]    |
Dec 19 13:47:52.415 INFO [stderr] 96 |     fn grandparent(&self) -> Weak<RedBlackNode<T>> {
Dec 19 13:47:52.415 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:47:52.415 INFO [stderr] 
Dec 19 13:47:52.415 INFO [stderr] warning: method is never used: `uncle`
Dec 19 13:47:52.415 INFO [stderr]    --> src/lib.rs:106:5
Dec 19 13:47:52.415 INFO [stderr]     |
Dec 19 13:47:52.415 INFO [stderr] 106 |     fn uncle(&self) -> Weak<RedBlackNode<T>> {
Dec 19 13:47:52.415 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:47:52.415 INFO [stderr] 
Dec 19 13:47:52.625 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
Dec 19 13:47:52.898 INFO running `"docker" "inspect" "14da62e7d707e384dee5a55ffb0c4b774fc5c6063bc18aaf42f9625623656f7d"`
Dec 19 13:47:52.963 INFO running `"docker" "rm" "-f" "14da62e7d707e384dee5a55ffb0c4b774fc5c6063bc18aaf42f9625623656f7d"`
Dec 19 13:47:53.052 INFO [stdout] 14da62e7d707e384dee5a55ffb0c4b774fc5c6063bc18aaf42f9625623656f7d