Nov 27 21:53:43.597 INFO checking robbystk/rust-by-the-book against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 27 21:53:43.599 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-7/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/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 21:53:43.944 INFO [stdout] c7115fb23bfd46b22672aaba3027ae393145b80419ca6279bad11b31e7812505
Nov 27 21:53:43.948 INFO running `"docker" "start" "-a" "c7115fb23bfd46b22672aaba3027ae393145b80419ca6279bad11b31e7812505"`
Nov 27 21:53:44.431 INFO [stderr] usermod: no changes
Nov 27 21:53:44.463 INFO [stderr]     Checking errors v0.1.0 (/source)
Nov 27 21:53:44.645 INFO [stderr] warning: unused variable: `f`
Nov 27 21:53:44.645 INFO [stderr]  --> src/main.rs:4:9
Nov 27 21:53:44.645 INFO [stderr]   |
Nov 27 21:53:44.645 INFO [stderr] 4 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");
Nov 27 21:53:44.645 INFO [stderr]   |         ^ help: consider using `_f` instead
Nov 27 21:53:44.645 INFO [stderr]   |
Nov 27 21:53:44.645 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 27 21:53:44.645 INFO [stderr] 
Nov 27 21:53:44.689 INFO [stderr] warning: unused variable: `f`
Nov 27 21:53:44.689 INFO [stderr]  --> src/main.rs:4:9
Nov 27 21:53:44.689 INFO [stderr]   |
Nov 27 21:53:44.689 INFO [stderr] 4 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");
Nov 27 21:53:44.689 INFO [stderr]   |         ^ help: consider using `_f` instead
Nov 27 21:53:44.689 INFO [stderr]   |
Nov 27 21:53:44.689 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 27 21:53:44.689 INFO [stderr] 
Nov 27 21:53:44.708 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.25s
Nov 27 21:53:44.709 INFO [stderr] su: No module specific data is present
Nov 27 21:53:45.174 INFO running `"docker" "inspect" "c7115fb23bfd46b22672aaba3027ae393145b80419ca6279bad11b31e7812505"`
Nov 27 21:53:45.425 INFO running `"docker" "rm" "-f" "c7115fb23bfd46b22672aaba3027ae393145b80419ca6279bad11b31e7812505"`
Nov 27 21:53:45.748 INFO [stdout] c7115fb23bfd46b22672aaba3027ae393145b80419ca6279bad11b31e7812505