Dec 04 15:19:17.177 INFO checking lbrande/red-black-tree against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 15:19:17.177 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-5/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1df97983eb2057dc6a8f7eb364e263b51ae23230-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 15:19:17.522 INFO [stdout] a61d0aa8cbb4cdc4a04c3889aa92ba30d5fb24601931c8a131ffc4e1bf187b49
Dec 04 15:19:17.529 INFO running `"docker" "start" "-a" "a61d0aa8cbb4cdc4a04c3889aa92ba30d5fb24601931c8a131ffc4e1bf187b49"`
Dec 04 15:19:18.294 INFO [stderr] usermod: no changes
Dec 04 15:19:18.331 INFO [stderr]     Checking red-black-tree v0.1.0 (/source)
Dec 04 15:19:18.659 INFO [stderr] warning: field is never used: `parent`
Dec 04 15:19:18.659 INFO [stderr]   --> src/lib.rs:36:5
Dec 04 15:19:18.659 INFO [stderr]    |
Dec 04 15:19:18.659 INFO [stderr] 36 |     parent: RefCell<Weak<RedBlackNode<T>>>,
Dec 04 15:19:18.659 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 15:19:18.659 INFO [stderr]    |
Dec 04 15:19:18.659 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 15:19:18.659 INFO [stderr] 
Dec 04 15:19:18.659 INFO [stderr] warning: field is never used: `red`
Dec 04 15:19:18.659 INFO [stderr]   --> src/lib.rs:39:5
Dec 04 15:19:18.659 INFO [stderr]    |
Dec 04 15:19:18.659 INFO [stderr] 39 |     red: bool,
Dec 04 15:19:18.659 INFO [stderr]    |     ^^^^^^^^^
Dec 04 15:19:18.659 INFO [stderr] 
Dec 04 15:19:18.659 INFO [stderr] warning: method is never used: `grandparent`
Dec 04 15:19:18.659 INFO [stderr]   --> src/lib.rs:96:5
Dec 04 15:19:18.659 INFO [stderr]    |
Dec 04 15:19:18.659 INFO [stderr] 96 |     fn grandparent(&self) -> Weak<RedBlackNode<T>> {
Dec 04 15:19:18.659 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 15:19:18.659 INFO [stderr] 
Dec 04 15:19:18.659 INFO [stderr] warning: method is never used: `uncle`
Dec 04 15:19:18.659 INFO [stderr]    --> src/lib.rs:106:5
Dec 04 15:19:18.659 INFO [stderr]     |
Dec 04 15:19:18.659 INFO [stderr] 106 |     fn uncle(&self) -> Weak<RedBlackNode<T>> {
Dec 04 15:19:18.659 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 15:19:18.659 INFO [stderr] 
Dec 04 15:19:18.819 INFO [stderr] warning: field is never used: `parent`
Dec 04 15:19:18.819 INFO [stderr]   --> src/lib.rs:36:5
Dec 04 15:19:18.819 INFO [stderr]    |
Dec 04 15:19:18.819 INFO [stderr] 36 |     parent: RefCell<Weak<RedBlackNode<T>>>,
Dec 04 15:19:18.819 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 15:19:18.819 INFO [stderr]    |
Dec 04 15:19:18.819 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 15:19:18.819 INFO [stderr] 
Dec 04 15:19:18.819 INFO [stderr] warning: field is never used: `red`
Dec 04 15:19:18.819 INFO [stderr]   --> src/lib.rs:39:5
Dec 04 15:19:18.820 INFO [stderr]    |
Dec 04 15:19:18.820 INFO [stderr] 39 |     red: bool,
Dec 04 15:19:18.820 INFO [stderr]    |     ^^^^^^^^^
Dec 04 15:19:18.820 INFO [stderr] 
Dec 04 15:19:18.820 INFO [stderr] warning: method is never used: `grandparent`
Dec 04 15:19:18.820 INFO [stderr]   --> src/lib.rs:96:5
Dec 04 15:19:18.820 INFO [stderr]    |
Dec 04 15:19:18.820 INFO [stderr] 96 |     fn grandparent(&self) -> Weak<RedBlackNode<T>> {
Dec 04 15:19:18.820 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 15:19:18.820 INFO [stderr] 
Dec 04 15:19:18.820 INFO [stderr] warning: method is never used: `uncle`
Dec 04 15:19:18.820 INFO [stderr]    --> src/lib.rs:106:5
Dec 04 15:19:18.820 INFO [stderr]     |
Dec 04 15:19:18.820 INFO [stderr] 106 |     fn uncle(&self) -> Weak<RedBlackNode<T>> {
Dec 04 15:19:18.820 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 15:19:18.820 INFO [stderr] 
Dec 04 15:19:19.237 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
Dec 04 15:19:19.240 INFO [stderr] su: No module specific data is present
Dec 04 15:19:20.080 INFO running `"docker" "inspect" "a61d0aa8cbb4cdc4a04c3889aa92ba30d5fb24601931c8a131ffc4e1bf187b49"`
Dec 04 15:19:20.211 INFO running `"docker" "rm" "-f" "a61d0aa8cbb4cdc4a04c3889aa92ba30d5fb24601931c8a131ffc4e1bf187b49"`
Dec 04 15:19:20.404 INFO [stdout] a61d0aa8cbb4cdc4a04c3889aa92ba30d5fb24601931c8a131ffc4e1bf187b49