Dec 04 10:26:37.587 INFO checking serayuzgur/chainake against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 10:26:37.587 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-1/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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 04 10:26:37.875 INFO [stdout] 1ea35f2137549165c2d5ddc0546a630ff2730588f32937e4e48c7bd20f56bd8d
Dec 04 10:26:37.877 INFO running `"docker" "start" "-a" "1ea35f2137549165c2d5ddc0546a630ff2730588f32937e4e48c7bd20f56bd8d"`
Dec 04 10:26:38.579 INFO [stderr] usermod: no changes
Dec 04 10:26:38.643 INFO [stderr]     Checking chainake v0.0.1-alpha.1 (/source)
Dec 04 10:26:38.947 INFO [stderr] warning: unused variable: `difficulty`
Dec 04 10:26:38.947 INFO [stderr]   --> src/main.rs:29:25
Dec 04 10:26:38.947 INFO [stderr]    |
Dec 04 10:26:38.947 INFO [stderr] 29 |     fn play( &mut self, difficulty: usize) {
Dec 04 10:26:38.947 INFO [stderr]    |                         ^^^^^^^^^^ help: consider using `_difficulty` instead
Dec 04 10:26:38.947 INFO [stderr]    |
Dec 04 10:26:38.947 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 10:26:38.947 INFO [stderr] 
Dec 04 10:26:38.980 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 10:26:38.980 INFO [stderr]   --> src/main.rs:42:9
Dec 04 10:26:38.980 INFO [stderr]    |
Dec 04 10:26:38.980 INFO [stderr] 42 |         stdout.flush();
Dec 04 10:26:38.980 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 04 10:26:38.980 INFO [stderr]    |
Dec 04 10:26:38.980 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 10:26:38.980 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 10:26:38.980 INFO [stderr] 
Dec 04 10:26:39.071 INFO [stderr] warning: unused variable: `difficulty`
Dec 04 10:26:39.071 INFO [stderr]   --> src/main.rs:29:25
Dec 04 10:26:39.071 INFO [stderr]    |
Dec 04 10:26:39.071 INFO [stderr] 29 |     fn play( &mut self, difficulty: usize) {
Dec 04 10:26:39.071 INFO [stderr]    |                         ^^^^^^^^^^ help: consider using `_difficulty` instead
Dec 04 10:26:39.071 INFO [stderr]    |
Dec 04 10:26:39.071 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 10:26:39.071 INFO [stderr] 
Dec 04 10:26:39.111 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 10:26:39.111 INFO [stderr]   --> src/main.rs:42:9
Dec 04 10:26:39.111 INFO [stderr]    |
Dec 04 10:26:39.111 INFO [stderr] 42 |         stdout.flush();
Dec 04 10:26:39.111 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 04 10:26:39.111 INFO [stderr]    |
Dec 04 10:26:39.111 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 10:26:39.111 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 10:26:39.111 INFO [stderr] 
Dec 04 10:26:39.121 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
Dec 04 10:26:39.125 INFO [stderr] su: No module specific data is present
Dec 04 10:26:39.556 INFO running `"docker" "inspect" "1ea35f2137549165c2d5ddc0546a630ff2730588f32937e4e48c7bd20f56bd8d"`
Dec 04 10:26:39.676 INFO running `"docker" "rm" "-f" "1ea35f2137549165c2d5ddc0546a630ff2730588f32937e4e48c7bd20f56bd8d"`
Dec 04 10:26:39.776 INFO [stdout] 1ea35f2137549165c2d5ddc0546a630ff2730588f32937e4e48c7bd20f56bd8d