Dec 11 14:54:12.288 INFO checking lbrande/red-black-tree against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 14:54:12.288 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-3/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 11 14:54:12.700 INFO [stdout] 25e453a65bb055fef040c846ea664d7252bc56d11e43f94f5713dd5abc291f84
Dec 11 14:54:12.702 INFO running `"docker" "start" "-a" "25e453a65bb055fef040c846ea664d7252bc56d11e43f94f5713dd5abc291f84"`
Dec 11 14:54:13.416 INFO [stderr] usermod: no changes
Dec 11 14:54:13.441 INFO [stderr]     Checking red-black-tree v0.1.0 (/source)
Dec 11 14:54:13.785 INFO [stderr] warning: field is never used: `parent`
Dec 11 14:54:13.785 INFO [stderr]   --> src/lib.rs:36:5
Dec 11 14:54:13.785 INFO [stderr]    |
Dec 11 14:54:13.785 INFO [stderr] 36 |     parent: RefCell<Weak<RedBlackNode<T>>>,
Dec 11 14:54:13.785 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:54:13.785 INFO [stderr]    |
Dec 11 14:54:13.785 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 11 14:54:13.785 INFO [stderr] 
Dec 11 14:54:13.785 INFO [stderr] warning: field is never used: `red`
Dec 11 14:54:13.785 INFO [stderr]   --> src/lib.rs:39:5
Dec 11 14:54:13.785 INFO [stderr]    |
Dec 11 14:54:13.785 INFO [stderr] 39 |     red: bool,
Dec 11 14:54:13.785 INFO [stderr]    |     ^^^^^^^^^
Dec 11 14:54:13.785 INFO [stderr] 
Dec 11 14:54:13.785 INFO [stderr] warning: method is never used: `grandparent`
Dec 11 14:54:13.785 INFO [stderr]   --> src/lib.rs:96:5
Dec 11 14:54:13.785 INFO [stderr]    |
Dec 11 14:54:13.785 INFO [stderr] 96 |     fn grandparent(&self) -> Weak<RedBlackNode<T>> {
Dec 11 14:54:13.785 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:54:13.785 INFO [stderr] 
Dec 11 14:54:13.785 INFO [stderr] warning: method is never used: `uncle`
Dec 11 14:54:13.785 INFO [stderr]    --> src/lib.rs:106:5
Dec 11 14:54:13.785 INFO [stderr]     |
Dec 11 14:54:13.785 INFO [stderr] 106 |     fn uncle(&self) -> Weak<RedBlackNode<T>> {
Dec 11 14:54:13.785 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:54:13.785 INFO [stderr] 
Dec 11 14:54:13.864 INFO [stderr] warning: field is never used: `parent`
Dec 11 14:54:13.865 INFO [stderr]   --> src/lib.rs:36:5
Dec 11 14:54:13.865 INFO [stderr]    |
Dec 11 14:54:13.865 INFO [stderr] 36 |     parent: RefCell<Weak<RedBlackNode<T>>>,
Dec 11 14:54:13.865 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:54:13.865 INFO [stderr]    |
Dec 11 14:54:13.865 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 11 14:54:13.865 INFO [stderr] 
Dec 11 14:54:13.865 INFO [stderr] warning: field is never used: `red`
Dec 11 14:54:13.865 INFO [stderr]   --> src/lib.rs:39:5
Dec 11 14:54:13.865 INFO [stderr]    |
Dec 11 14:54:13.865 INFO [stderr] 39 |     red: bool,
Dec 11 14:54:13.865 INFO [stderr]    |     ^^^^^^^^^
Dec 11 14:54:13.865 INFO [stderr] 
Dec 11 14:54:13.865 INFO [stderr] warning: method is never used: `grandparent`
Dec 11 14:54:13.865 INFO [stderr]   --> src/lib.rs:96:5
Dec 11 14:54:13.865 INFO [stderr]    |
Dec 11 14:54:13.865 INFO [stderr] 96 |     fn grandparent(&self) -> Weak<RedBlackNode<T>> {
Dec 11 14:54:13.865 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:54:13.865 INFO [stderr] 
Dec 11 14:54:13.865 INFO [stderr] warning: method is never used: `uncle`
Dec 11 14:54:13.865 INFO [stderr]    --> src/lib.rs:106:5
Dec 11 14:54:13.865 INFO [stderr]     |
Dec 11 14:54:13.865 INFO [stderr] 106 |     fn uncle(&self) -> Weak<RedBlackNode<T>> {
Dec 11 14:54:13.865 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:54:13.865 INFO [stderr] 
Dec 11 14:54:14.155 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
Dec 11 14:54:14.156 INFO [stderr] su: No module specific data is present
Dec 11 14:54:14.564 INFO running `"docker" "inspect" "25e453a65bb055fef040c846ea664d7252bc56d11e43f94f5713dd5abc291f84"`
Dec 11 14:54:14.684 INFO running `"docker" "rm" "-f" "25e453a65bb055fef040c846ea664d7252bc56d11e43f94f5713dd5abc291f84"`
Dec 11 14:54:14.779 INFO [stdout] 25e453a65bb055fef040c846ea664d7252bc56d11e43f94f5713dd5abc291f84