Dec 17 15:41:31.730 INFO checking serayuzgur/chainake against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 15:41:31.730 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/serayuzgur/chainake:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 15:41:32.178 INFO [stdout] e8d62657ade766eab83591598967ea62204091131482b062a12c9288a077e58a
Dec 17 15:41:32.182 INFO running `"docker" "start" "-a" "e8d62657ade766eab83591598967ea62204091131482b062a12c9288a077e58a"`
Dec 17 15:41:34.216 INFO [stderr]     Checking termion v1.5.1
Dec 17 15:41:35.149 INFO [stderr]     Checking chainake v0.0.1-alpha.1 (/opt/crater/workdir)
Dec 17 15:41:35.517 INFO [stderr] warning: unused variable: `difficulty`
Dec 17 15:41:35.517 INFO [stderr]   --> src/main.rs:29:25
Dec 17 15:41:35.517 INFO [stderr]    |
Dec 17 15:41:35.517 INFO [stderr] 29 |     fn play( &mut self, difficulty: usize) {
Dec 17 15:41:35.517 INFO [stderr]    |                         ^^^^^^^^^^ help: consider using `_difficulty` instead
Dec 17 15:41:35.517 INFO [stderr]    |
Dec 17 15:41:35.517 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 15:41:35.517 INFO [stderr] 
Dec 17 15:41:35.520 INFO [stderr] warning: unused variable: `difficulty`
Dec 17 15:41:35.520 INFO [stderr]   --> src/main.rs:29:25
Dec 17 15:41:35.520 INFO [stderr]    |
Dec 17 15:41:35.520 INFO [stderr] 29 |     fn play( &mut self, difficulty: usize) {
Dec 17 15:41:35.520 INFO [stderr]    |                         ^^^^^^^^^^ help: consider using `_difficulty` instead
Dec 17 15:41:35.520 INFO [stderr]    |
Dec 17 15:41:35.520 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 15:41:35.520 INFO [stderr] 
Dec 17 15:41:35.556 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:41:35.556 INFO [stderr]   --> src/main.rs:42:9
Dec 17 15:41:35.556 INFO [stderr]    |
Dec 17 15:41:35.556 INFO [stderr] 42 |         stdout.flush();
Dec 17 15:41:35.556 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 17 15:41:35.556 INFO [stderr]    |
Dec 17 15:41:35.556 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 15:41:35.556 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:41:35.556 INFO [stderr] 
Dec 17 15:41:35.568 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:41:35.568 INFO [stderr]   --> src/main.rs:42:9
Dec 17 15:41:35.568 INFO [stderr]    |
Dec 17 15:41:35.568 INFO [stderr] 42 |         stdout.flush();
Dec 17 15:41:35.568 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 17 15:41:35.568 INFO [stderr]    |
Dec 17 15:41:35.568 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 15:41:35.568 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:41:35.568 INFO [stderr] 
Dec 17 15:41:35.611 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.49s
Dec 17 15:41:36.231 INFO running `"docker" "inspect" "e8d62657ade766eab83591598967ea62204091131482b062a12c9288a077e58a"`
Dec 17 15:41:36.503 INFO running `"docker" "rm" "-f" "e8d62657ade766eab83591598967ea62204091131482b062a12c9288a077e58a"`
Dec 17 15:41:36.879 INFO [stdout] e8d62657ade766eab83591598967ea62204091131482b062a12c9288a077e58a