Nov 29 19:38:58.435 INFO checking robbystk/rust-by-the-book against master#a49316ddc99d9d595193557fc899f6c52e4d9af9 for pr-56323
Nov 29 19:38:58.435 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-0/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56323/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/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 +a49316ddc99d9d595193557fc899f6c52e4d9af9-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 19:38:58.626 INFO [stdout] 000b9dfc7f469abe3258572374e422fd910b48b6f364e8be6d1e0c70e7cbdb7d
Nov 29 19:38:58.628 INFO running `"docker" "start" "-a" "000b9dfc7f469abe3258572374e422fd910b48b6f364e8be6d1e0c70e7cbdb7d"`
Nov 29 19:38:59.134 INFO [stderr] usermod: no changes
Nov 29 19:38:59.178 INFO [stderr]     Checking errors v0.1.0 (/source)
Nov 29 19:38:59.380 INFO [stderr] warning: unused variable: `f`
Nov 29 19:38:59.380 INFO [stderr]  --> src/main.rs:4:9
Nov 29 19:38:59.380 INFO [stderr]   |
Nov 29 19:38:59.380 INFO [stderr] 4 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");
Nov 29 19:38:59.380 INFO [stderr]   |         ^ help: consider using `_f` instead
Nov 29 19:38:59.380 INFO [stderr]   |
Nov 29 19:38:59.380 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 29 19:38:59.380 INFO [stderr] 
Nov 29 19:38:59.540 INFO [stderr] warning: unused variable: `f`
Nov 29 19:38:59.540 INFO [stderr]  --> src/main.rs:4:9
Nov 29 19:38:59.540 INFO [stderr]   |
Nov 29 19:38:59.540 INFO [stderr] 4 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");
Nov 29 19:38:59.540 INFO [stderr]   |         ^ help: consider using `_f` instead
Nov 29 19:38:59.540 INFO [stderr]   |
Nov 29 19:38:59.540 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 29 19:38:59.540 INFO [stderr] 
Nov 29 19:38:59.548 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
Nov 29 19:38:59.556 INFO [stderr] su: No module specific data is present
Nov 29 19:39:00.408 INFO running `"docker" "inspect" "000b9dfc7f469abe3258572374e422fd910b48b6f364e8be6d1e0c70e7cbdb7d"`
Nov 29 19:39:00.668 INFO running `"docker" "rm" "-f" "000b9dfc7f469abe3258572374e422fd910b48b6f364e8be6d1e0c70e7cbdb7d"`
Nov 29 19:39:00.919 INFO [stdout] 000b9dfc7f469abe3258572374e422fd910b48b6f364e8be6d1e0c70e7cbdb7d