Nov 27 20:49:44.914 INFO checking seb-odessa/btree against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 27 20:49:44.914 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-6/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/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 +db42d4dad33013eba11ef37342ad9f614e5652b8-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 27 20:49:45.127 INFO [stdout] b4c54751d496127a4c7752453e649fd049bc4f97fdcffa9ac506a5032dfebe25
Nov 27 20:49:45.129 INFO running `"docker" "start" "-a" "b4c54751d496127a4c7752453e649fd049bc4f97fdcffa9ac506a5032dfebe25"`
Nov 27 20:49:45.817 INFO [stderr] usermod: no changes
Nov 27 20:49:45.880 INFO [stderr]     Checking BTree v0.1.0 (/source)
Nov 27 20:49:46.109 INFO [stderr] warning: unused import: `Formatter`
Nov 27 20:49:46.109 INFO [stderr]  --> src/main.rs:1:25
Nov 27 20:49:46.109 INFO [stderr]   |
Nov 27 20:49:46.110 INFO [stderr] 1 | use std::fmt::{Display, Formatter};
Nov 27 20:49:46.110 INFO [stderr]   |                         ^^^^^^^^^
Nov 27 20:49:46.110 INFO [stderr]   |
Nov 27 20:49:46.111 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 27 20:49:46.111 INFO [stderr] 
Nov 27 20:49:46.175 INFO [stderr] warning: variable does not need to be mutable
Nov 27 20:49:46.175 INFO [stderr]    --> src/main.rs:149:14
Nov 27 20:49:46.175 INFO [stderr]     |
Nov 27 20:49:46.175 INFO [stderr] 149 |         Some(mut node) => node.update("Z".to_string()),
Nov 27 20:49:46.175 INFO [stderr]     |              ----^^^^
Nov 27 20:49:46.175 INFO [stderr]     |              |
Nov 27 20:49:46.175 INFO [stderr]     |              help: remove this `mut`
Nov 27 20:49:46.175 INFO [stderr]     |
Nov 27 20:49:46.175 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Nov 27 20:49:46.175 INFO [stderr] 
Nov 27 20:49:46.175 INFO [stderr] warning: crate `BTree` should have a snake case name such as `btree`
Nov 27 20:49:46.175 INFO [stderr]   |
Nov 27 20:49:46.175 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Nov 27 20:49:46.175 INFO [stderr] 
Nov 27 20:49:46.247 INFO [stderr] warning: unused import: `Formatter`
Nov 27 20:49:46.247 INFO [stderr]  --> src/main.rs:1:25
Nov 27 20:49:46.247 INFO [stderr]   |
Nov 27 20:49:46.247 INFO [stderr] 1 | use std::fmt::{Display, Formatter};
Nov 27 20:49:46.248 INFO [stderr]   |                         ^^^^^^^^^
Nov 27 20:49:46.248 INFO [stderr]   |
Nov 27 20:49:46.248 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 27 20:49:46.248 INFO [stderr] 
Nov 27 20:49:46.314 INFO [stderr] warning: variable does not need to be mutable
Nov 27 20:49:46.314 INFO [stderr]    --> src/main.rs:149:14
Nov 27 20:49:46.314 INFO [stderr]     |
Nov 27 20:49:46.314 INFO [stderr] 149 |         Some(mut node) => node.update("Z".to_string()),
Nov 27 20:49:46.314 INFO [stderr]     |              ----^^^^
Nov 27 20:49:46.314 INFO [stderr]     |              |
Nov 27 20:49:46.314 INFO [stderr]     |              help: remove this `mut`
Nov 27 20:49:46.314 INFO [stderr]     |
Nov 27 20:49:46.314 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Nov 27 20:49:46.314 INFO [stderr] 
Nov 27 20:49:46.314 INFO [stderr] warning: crate `BTree` should have a snake case name such as `btree`
Nov 27 20:49:46.314 INFO [stderr]   |
Nov 27 20:49:46.314 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Nov 27 20:49:46.314 INFO [stderr] 
Nov 27 20:49:46.354 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
Nov 27 20:49:46.357 INFO [stderr] su: No module specific data is present
Nov 27 20:49:46.914 INFO running `"docker" "inspect" "b4c54751d496127a4c7752453e649fd049bc4f97fdcffa9ac506a5032dfebe25"`
Nov 27 20:49:47.102 INFO running `"docker" "rm" "-f" "b4c54751d496127a4c7752453e649fd049bc4f97fdcffa9ac506a5032dfebe25"`
Nov 27 20:49:47.388 INFO [stdout] b4c54751d496127a4c7752453e649fd049bc4f97fdcffa9ac506a5032dfebe25