Nov 29 19:38:57.901 INFO checking robbystk/rust-by-the-book against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 29 19:38:57.901 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-1/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/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 19:38:58.243 INFO [stdout] 36f88a99fc41734a56b0ad19ec7d88ef773b07cca842af43bef82a1136b7ff7f
Nov 29 19:38:58.245 INFO running `"docker" "start" "-a" "36f88a99fc41734a56b0ad19ec7d88ef773b07cca842af43bef82a1136b7ff7f"`
Nov 29 19:38:58.725 INFO [stderr] usermod: no changes
Nov 29 19:38:58.749 INFO [stderr]     Checking errors v0.1.0 (/source)
Nov 29 19:38:58.941 INFO [stderr] warning: unused variable: `f`
Nov 29 19:38:58.941 INFO [stderr]  --> src/main.rs:4:9
Nov 29 19:38:58.941 INFO [stderr]   |
Nov 29 19:38:58.941 INFO [stderr] 4 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");
Nov 29 19:38:58.941 INFO [stderr]   |         ^ help: consider using `_f` instead
Nov 29 19:38:58.941 INFO [stderr]   |
Nov 29 19:38:58.941 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 29 19:38:58.941 INFO [stderr] 
Nov 29 19:38:58.965 INFO [stderr] warning: unused variable: `f`
Nov 29 19:38:58.965 INFO [stderr]  --> src/main.rs:4:9
Nov 29 19:38:58.965 INFO [stderr]   |
Nov 29 19:38:58.965 INFO [stderr] 4 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");
Nov 29 19:38:58.965 INFO [stderr]   |         ^ help: consider using `_f` instead
Nov 29 19:38:58.965 INFO [stderr]   |
Nov 29 19:38:58.965 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 29 19:38:58.965 INFO [stderr] 
Nov 29 19:38:58.973 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.23s
Nov 29 19:38:58.975 INFO [stderr] su: No module specific data is present
Nov 29 19:38:59.397 INFO running `"docker" "inspect" "36f88a99fc41734a56b0ad19ec7d88ef773b07cca842af43bef82a1136b7ff7f"`
Nov 29 19:38:59.654 INFO running `"docker" "rm" "-f" "36f88a99fc41734a56b0ad19ec7d88ef773b07cca842af43bef82a1136b7ff7f"`
Nov 29 19:38:59.904 INFO [stdout] 36f88a99fc41734a56b0ad19ec7d88ef773b07cca842af43bef82a1136b7ff7f