Oct 12 16:59:19.319 INFO checking mtraina/rust-by-example against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 16:59:19.320 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-6/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-6/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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"`
Oct 12 16:59:19.734 INFO blam! 3b44b1b721b295f80144b48494b74677ba3dada976e2762f837011d30c369b62
Oct 12 16:59:19.735 INFO running `"docker" "start" "-a" "3b44b1b721b295f80144b48494b74677ba3dada976e2762f837011d30c369b62"`
Oct 12 16:59:21.931 INFO kablam! usermod: no changes
Oct 12 16:59:22.018 INFO kablam!     Checking rust_by_example v0.1.0 (/source)
Oct 12 16:59:22.884 INFO kablam! warning: struct is never constructed: `Structure`
Oct 12 16:59:22.885 INFO kablam!   --> examples/1_2_formatted_print.rs:34:5
Oct 12 16:59:22.886 INFO kablam!    |
Oct 12 16:59:22.887 INFO kablam! 34 |     struct Structure(i32);
Oct 12 16:59:22.887 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^
Oct 12 16:59:22.888 INFO kablam!    |
Oct 12 16:59:22.889 INFO kablam!    = note: #[warn(dead_code)] on by default
Oct 12 16:59:22.892 INFO kablam! 
Oct 12 16:59:23.188 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.21s
Oct 12 16:59:23.192 INFO kablam! su: No module specific data is present
Oct 12 16:59:24.833 INFO running `"docker" "rm" "-f" "3b44b1b721b295f80144b48494b74677ba3dada976e2762f837011d30c369b62"`
Oct 12 16:59:25.246 INFO blam! 3b44b1b721b295f80144b48494b74677ba3dada976e2762f837011d30c369b62