Nov 29 23:33:33.949 INFO checking lbrande/red-black-tree against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 29 23:33:33.949 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-6/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/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 +32252761328f59ccfadb1bafb8148c685bc830b3-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"`
Nov 29 23:33:34.112 INFO [stdout] 49d7362f118655e0d02c0eb3d1e8fd99541cff6c934af14fb6ea844b3c1bd00e
Nov 29 23:33:34.114 INFO running `"docker" "start" "-a" "49d7362f118655e0d02c0eb3d1e8fd99541cff6c934af14fb6ea844b3c1bd00e"`
Nov 29 23:33:34.667 INFO [stderr] usermod: no changes
Nov 29 23:33:34.696 INFO [stderr]     Checking red-black-tree v0.1.0 (/source)
Nov 29 23:33:35.040 INFO [stderr] warning: field is never used: `parent`
Nov 29 23:33:35.040 INFO [stderr]   --> src/lib.rs:36:5
Nov 29 23:33:35.040 INFO [stderr]    |
Nov 29 23:33:35.040 INFO [stderr] 36 |     parent: RefCell<Weak<RedBlackNode<T>>>,
Nov 29 23:33:35.040 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 23:33:35.040 INFO [stderr]    |
Nov 29 23:33:35.040 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 29 23:33:35.040 INFO [stderr] 
Nov 29 23:33:35.040 INFO [stderr] warning: field is never used: `red`
Nov 29 23:33:35.040 INFO [stderr]   --> src/lib.rs:39:5
Nov 29 23:33:35.040 INFO [stderr]    |
Nov 29 23:33:35.040 INFO [stderr] 39 |     red: bool,
Nov 29 23:33:35.040 INFO [stderr]    |     ^^^^^^^^^
Nov 29 23:33:35.040 INFO [stderr] 
Nov 29 23:33:35.040 INFO [stderr] warning: method is never used: `grandparent`
Nov 29 23:33:35.040 INFO [stderr]   --> src/lib.rs:96:5
Nov 29 23:33:35.040 INFO [stderr]    |
Nov 29 23:33:35.040 INFO [stderr] 96 |     fn grandparent(&self) -> Weak<RedBlackNode<T>> {
Nov 29 23:33:35.040 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 23:33:35.041 INFO [stderr] 
Nov 29 23:33:35.041 INFO [stderr] warning: method is never used: `uncle`
Nov 29 23:33:35.041 INFO [stderr]    --> src/lib.rs:106:5
Nov 29 23:33:35.041 INFO [stderr]     |
Nov 29 23:33:35.041 INFO [stderr] 106 |     fn uncle(&self) -> Weak<RedBlackNode<T>> {
Nov 29 23:33:35.041 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 23:33:35.041 INFO [stderr] 
Nov 29 23:33:35.052 INFO [stderr] warning: field is never used: `parent`
Nov 29 23:33:35.052 INFO [stderr]   --> src/lib.rs:36:5
Nov 29 23:33:35.052 INFO [stderr]    |
Nov 29 23:33:35.052 INFO [stderr] 36 |     parent: RefCell<Weak<RedBlackNode<T>>>,
Nov 29 23:33:35.052 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 23:33:35.052 INFO [stderr]    |
Nov 29 23:33:35.052 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 29 23:33:35.052 INFO [stderr] 
Nov 29 23:33:35.052 INFO [stderr] warning: field is never used: `red`
Nov 29 23:33:35.052 INFO [stderr]   --> src/lib.rs:39:5
Nov 29 23:33:35.052 INFO [stderr]    |
Nov 29 23:33:35.052 INFO [stderr] 39 |     red: bool,
Nov 29 23:33:35.052 INFO [stderr]    |     ^^^^^^^^^
Nov 29 23:33:35.055 INFO [stderr] 
Nov 29 23:33:35.055 INFO [stderr] warning: method is never used: `grandparent`
Nov 29 23:33:35.055 INFO [stderr]   --> src/lib.rs:96:5
Nov 29 23:33:35.055 INFO [stderr]    |
Nov 29 23:33:35.055 INFO [stderr] 96 |     fn grandparent(&self) -> Weak<RedBlackNode<T>> {
Nov 29 23:33:35.055 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 23:33:35.055 INFO [stderr] 
Nov 29 23:33:35.055 INFO [stderr] warning: method is never used: `uncle`
Nov 29 23:33:35.055 INFO [stderr]    --> src/lib.rs:106:5
Nov 29 23:33:35.055 INFO [stderr]     |
Nov 29 23:33:35.055 INFO [stderr] 106 |     fn uncle(&self) -> Weak<RedBlackNode<T>> {
Nov 29 23:33:35.055 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 23:33:35.055 INFO [stderr] 
Nov 29 23:33:35.562 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
Nov 29 23:33:35.564 INFO [stderr] su: No module specific data is present
Nov 29 23:33:35.999 INFO running `"docker" "inspect" "49d7362f118655e0d02c0eb3d1e8fd99541cff6c934af14fb6ea844b3c1bd00e"`
Nov 29 23:33:36.136 INFO running `"docker" "rm" "-f" "49d7362f118655e0d02c0eb3d1e8fd99541cff6c934af14fb6ea844b3c1bd00e"`
Nov 29 23:33:36.274 INFO [stdout] 49d7362f118655e0d02c0eb3d1e8fd99541cff6c934af14fb6ea844b3c1bd00e