Oct 13 11:16:34.589 INFO checking optional_struct-0.2.0 against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 11:16:34.590 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-0/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-0/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 13 11:16:34.972 INFO blam! 03853c9d81bc8a50539eeb607ef107a756c34236e06215a6fb62570637aef228
Oct 13 11:16:34.977 INFO running `"docker" "start" "-a" "03853c9d81bc8a50539eeb607ef107a756c34236e06215a6fb62570637aef228"`
Oct 13 11:16:35.918 INFO kablam! usermod: no changes
Oct 13 11:16:35.962 INFO kablam!    Compiling optional_struct v0.2.0 (/source)
Oct 13 11:16:43.528 INFO kablam! warning: struct is never constructed: `Config`
Oct 13 11:16:43.528 INFO kablam!  --> tests/empty.rs:5:1
Oct 13 11:16:43.528 INFO kablam!   |
Oct 13 11:16:43.528 INFO kablam! 5 | struct Config {
Oct 13 11:16:43.528 INFO kablam!   | ^^^^^^^^^^^^^
Oct 13 11:16:43.528 INFO kablam!   |
Oct 13 11:16:43.528 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 13 11:16:43.528 INFO kablam! 
Oct 13 11:16:43.557 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 7.62s
Oct 13 11:16:43.572 INFO kablam! su: No module specific data is present
Oct 13 11:16:44.250 INFO running `"docker" "rm" "-f" "03853c9d81bc8a50539eeb607ef107a756c34236e06215a6fb62570637aef228"`
Oct 13 11:16:44.588 INFO blam! 03853c9d81bc8a50539eeb607ef107a756c34236e06215a6fb62570637aef228