Dec 12 02:14:13.042 INFO checking Jarusk/kerrigan against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 02:14:13.043 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-5/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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"`
Dec 12 02:14:13.264 INFO [stdout] 711cc811820bed8b06a1335739ef1ecbf0880dde34063242e975eed75532df25
Dec 12 02:14:13.270 INFO running `"docker" "start" "-a" "711cc811820bed8b06a1335739ef1ecbf0880dde34063242e975eed75532df25"`
Dec 12 02:14:13.770 INFO [stderr] usermod: no changes
Dec 12 02:14:13.804 INFO [stderr]     Checking kerrigan v0.1.0 (/source)
Dec 12 02:14:14.210 INFO [stderr] warning: unused import: `std::env`
Dec 12 02:14:14.210 INFO [stderr]  --> src/parseargs.rs:1:5
Dec 12 02:14:14.210 INFO [stderr]   |
Dec 12 02:14:14.210 INFO [stderr] 1 | use std::env;
Dec 12 02:14:14.210 INFO [stderr]   |     ^^^^^^^^
Dec 12 02:14:14.210 INFO [stderr]   |
Dec 12 02:14:14.210 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 12 02:14:14.210 INFO [stderr] 
Dec 12 02:14:14.230 INFO [stderr] warning: field is never used: `num_queens`
Dec 12 02:14:14.231 INFO [stderr]   --> src/parseargs.rs:10:5
Dec 12 02:14:14.231 INFO [stderr]    |
Dec 12 02:14:14.231 INFO [stderr] 10 |     num_queens: u8,
Dec 12 02:14:14.231 INFO [stderr]    |     ^^^^^^^^^^^^^^
Dec 12 02:14:14.231 INFO [stderr]    |
Dec 12 02:14:14.231 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 02:14:14.231 INFO [stderr] 
Dec 12 02:14:14.231 INFO [stderr] warning: field is never used: `num_threads`
Dec 12 02:14:14.231 INFO [stderr]   --> src/parseargs.rs:11:5
Dec 12 02:14:14.231 INFO [stderr]    |
Dec 12 02:14:14.231 INFO [stderr] 11 |     num_threads: u8,
Dec 12 02:14:14.231 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 12 02:14:14.231 INFO [stderr] 
Dec 12 02:14:14.391 INFO [stderr] warning: unused import: `std::env`
Dec 12 02:14:14.391 INFO [stderr]  --> src/parseargs.rs:1:5
Dec 12 02:14:14.391 INFO [stderr]   |
Dec 12 02:14:14.391 INFO [stderr] 1 | use std::env;
Dec 12 02:14:14.391 INFO [stderr]   |     ^^^^^^^^
Dec 12 02:14:14.391 INFO [stderr]   |
Dec 12 02:14:14.392 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 12 02:14:14.392 INFO [stderr] 
Dec 12 02:14:14.405 INFO [stderr] warning: field is never used: `num_queens`
Dec 12 02:14:14.405 INFO [stderr]   --> src/parseargs.rs:10:5
Dec 12 02:14:14.405 INFO [stderr]    |
Dec 12 02:14:14.405 INFO [stderr] 10 |     num_queens: u8,
Dec 12 02:14:14.405 INFO [stderr]    |     ^^^^^^^^^^^^^^
Dec 12 02:14:14.405 INFO [stderr]    |
Dec 12 02:14:14.405 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 02:14:14.405 INFO [stderr] 
Dec 12 02:14:14.405 INFO [stderr] warning: field is never used: `num_threads`
Dec 12 02:14:14.405 INFO [stderr]   --> src/parseargs.rs:11:5
Dec 12 02:14:14.405 INFO [stderr]    |
Dec 12 02:14:14.405 INFO [stderr] 11 |     num_threads: u8,
Dec 12 02:14:14.405 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 12 02:14:14.405 INFO [stderr] 
Dec 12 02:14:14.416 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
Dec 12 02:14:14.418 INFO [stderr] su: No module specific data is present
Dec 12 02:14:14.796 INFO running `"docker" "inspect" "711cc811820bed8b06a1335739ef1ecbf0880dde34063242e975eed75532df25"`
Dec 12 02:14:14.924 INFO running `"docker" "rm" "-f" "711cc811820bed8b06a1335739ef1ecbf0880dde34063242e975eed75532df25"`
Dec 12 02:14:15.001 INFO [stdout] 711cc811820bed8b06a1335739ef1ecbf0880dde34063242e975eed75532df25