Dec 04 09:21:26.151 INFO checking suelz/chapter_4 against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 09:21:26.151 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 09:21:26.373 INFO [stdout] f7f4b84b83fbf3753d0ba500ba4ea3964b5b6963f78165216baf9a277dba6f0c
Dec 04 09:21:26.376 INFO running `"docker" "start" "-a" "f7f4b84b83fbf3753d0ba500ba4ea3964b5b6963f78165216baf9a277dba6f0c"`
Dec 04 09:21:26.847 INFO [stderr] usermod: no changes
Dec 04 09:21:26.876 INFO [stderr]     Checking ch4 v0.1.0 (/source)
Dec 04 09:21:27.059 INFO [stderr] warning: unused variable: `word`
Dec 04 09:21:27.059 INFO [stderr]   --> src/main.rs:28:9
Dec 04 09:21:27.059 INFO [stderr]    |
Dec 04 09:21:27.059 INFO [stderr] 28 |     let word = first_word(&x);
Dec 04 09:21:27.059 INFO [stderr]    |         ^^^^ help: consider using `_word` instead
Dec 04 09:21:27.059 INFO [stderr]    |
Dec 04 09:21:27.059 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 09:21:27.059 INFO [stderr] 
Dec 04 09:21:27.063 INFO [stderr] warning: variable does not need to be mutable
Dec 04 09:21:27.063 INFO [stderr]   --> src/main.rs:26:9
Dec 04 09:21:27.063 INFO [stderr]    |
Dec 04 09:21:27.063 INFO [stderr] 26 |     let mut x = String::from("Conor Kennedy");
Dec 04 09:21:27.063 INFO [stderr]    |         ----^
Dec 04 09:21:27.063 INFO [stderr]    |         |
Dec 04 09:21:27.063 INFO [stderr]    |         help: remove this `mut`
Dec 04 09:21:27.063 INFO [stderr]    |
Dec 04 09:21:27.063 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 09:21:27.063 INFO [stderr] 
Dec 04 09:21:27.069 INFO [stderr] warning: unused variable: `word`
Dec 04 09:21:27.069 INFO [stderr]   --> src/main.rs:28:9
Dec 04 09:21:27.069 INFO [stderr]    |
Dec 04 09:21:27.069 INFO [stderr] 28 |     let word = first_word(&x);
Dec 04 09:21:27.069 INFO [stderr]    |         ^^^^ help: consider using `_word` instead
Dec 04 09:21:27.069 INFO [stderr]    |
Dec 04 09:21:27.069 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 09:21:27.069 INFO [stderr] 
Dec 04 09:21:27.075 INFO [stderr] warning: variable does not need to be mutable
Dec 04 09:21:27.075 INFO [stderr]   --> src/main.rs:26:9
Dec 04 09:21:27.075 INFO [stderr]    |
Dec 04 09:21:27.075 INFO [stderr] 26 |     let mut x = String::from("Conor Kennedy");
Dec 04 09:21:27.075 INFO [stderr]    |         ----^
Dec 04 09:21:27.075 INFO [stderr]    |         |
Dec 04 09:21:27.075 INFO [stderr]    |         help: remove this `mut`
Dec 04 09:21:27.076 INFO [stderr]    |
Dec 04 09:21:27.076 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 09:21:27.077 INFO [stderr] 
Dec 04 09:21:27.111 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.24s
Dec 04 09:21:27.113 INFO [stderr] su: No module specific data is present
Dec 04 09:21:27.485 INFO running `"docker" "inspect" "f7f4b84b83fbf3753d0ba500ba4ea3964b5b6963f78165216baf9a277dba6f0c"`
Dec 04 09:21:27.597 INFO running `"docker" "rm" "-f" "f7f4b84b83fbf3753d0ba500ba4ea3964b5b6963f78165216baf9a277dba6f0c"`
Dec 04 09:21:27.719 INFO [stdout] f7f4b84b83fbf3753d0ba500ba4ea3964b5b6963f78165216baf9a277dba6f0c