Dec 11 09:53:39.904 INFO checking seb-odessa/btree against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 09:53:39.904 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-6/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 09:53:40.407 INFO [stdout] 28ab02e4845717d194cefd9e356c581fb4f0e64390c1746e348a65404df1412a
Dec 11 09:53:40.410 INFO running `"docker" "start" "-a" "28ab02e4845717d194cefd9e356c581fb4f0e64390c1746e348a65404df1412a"`
Dec 11 09:53:41.609 INFO [stderr] usermod: no changes
Dec 11 09:53:41.684 INFO [stderr]     Checking BTree v0.1.0 (/source)
Dec 11 09:53:41.917 INFO [stderr] warning: unused import: `Formatter`
Dec 11 09:53:41.917 INFO [stderr]  --> src/main.rs:1:25
Dec 11 09:53:41.917 INFO [stderr]   |
Dec 11 09:53:41.917 INFO [stderr] 1 | use std::fmt::{Display, Formatter};
Dec 11 09:53:41.917 INFO [stderr]   |                         ^^^^^^^^^
Dec 11 09:53:41.917 INFO [stderr]   |
Dec 11 09:53:41.917 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 09:53:41.917 INFO [stderr] 
Dec 11 09:53:41.986 INFO [stderr] warning: variable does not need to be mutable
Dec 11 09:53:41.987 INFO [stderr]    --> src/main.rs:149:14
Dec 11 09:53:41.987 INFO [stderr]     |
Dec 11 09:53:41.987 INFO [stderr] 149 |         Some(mut node) => node.update("Z".to_string()),
Dec 11 09:53:41.987 INFO [stderr]     |              ----^^^^
Dec 11 09:53:41.987 INFO [stderr]     |              |
Dec 11 09:53:41.987 INFO [stderr]     |              help: remove this `mut`
Dec 11 09:53:41.987 INFO [stderr]     |
Dec 11 09:53:41.987 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 11 09:53:41.987 INFO [stderr] 
Dec 11 09:53:41.988 INFO [stderr] warning: crate `BTree` should have a snake case name such as `btree`
Dec 11 09:53:41.988 INFO [stderr]   |
Dec 11 09:53:41.988 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 11 09:53:41.988 INFO [stderr] 
Dec 11 09:53:42.024 INFO [stderr] warning: unused import: `Formatter`
Dec 11 09:53:42.024 INFO [stderr]  --> src/main.rs:1:25
Dec 11 09:53:42.024 INFO [stderr]   |
Dec 11 09:53:42.024 INFO [stderr] 1 | use std::fmt::{Display, Formatter};
Dec 11 09:53:42.024 INFO [stderr]   |                         ^^^^^^^^^
Dec 11 09:53:42.024 INFO [stderr]   |
Dec 11 09:53:42.024 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 09:53:42.024 INFO [stderr] 
Dec 11 09:53:42.100 INFO [stderr] warning: variable does not need to be mutable
Dec 11 09:53:42.100 INFO [stderr]    --> src/main.rs:149:14
Dec 11 09:53:42.100 INFO [stderr]     |
Dec 11 09:53:42.100 INFO [stderr] 149 |         Some(mut node) => node.update("Z".to_string()),
Dec 11 09:53:42.100 INFO [stderr]     |              ----^^^^
Dec 11 09:53:42.100 INFO [stderr]     |              |
Dec 11 09:53:42.100 INFO [stderr]     |              help: remove this `mut`
Dec 11 09:53:42.100 INFO [stderr]     |
Dec 11 09:53:42.100 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 11 09:53:42.100 INFO [stderr] 
Dec 11 09:53:42.100 INFO [stderr] warning: crate `BTree` should have a snake case name such as `btree`
Dec 11 09:53:42.100 INFO [stderr]   |
Dec 11 09:53:42.100 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 11 09:53:42.100 INFO [stderr] 
Dec 11 09:53:42.142 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
Dec 11 09:53:42.145 INFO [stderr] su: No module specific data is present
Dec 11 09:53:42.878 INFO running `"docker" "inspect" "28ab02e4845717d194cefd9e356c581fb4f0e64390c1746e348a65404df1412a"`
Dec 11 09:53:43.124 INFO running `"docker" "rm" "-f" "28ab02e4845717d194cefd9e356c581fb4f0e64390c1746e348a65404df1412a"`
Dec 11 09:53:43.395 INFO [stdout] 28ab02e4845717d194cefd9e356c581fb4f0e64390c1746e348a65404df1412a