Dec 19 15:59:03.084 INFO checking huytd/sergaem against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 15:59:03.084 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/huytd/sergaem:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 15:59:03.283 INFO [stdout] 57f10e0fee40fb7aef764c81a8a8699760a6e965faec4f538a25d5e7ae1a6bcd
Dec 19 15:59:03.285 INFO running `"docker" "start" "-a" "57f10e0fee40fb7aef764c81a8a8699760a6e965faec4f538a25d5e7ae1a6bcd"`
Dec 19 15:59:03.933 INFO [stderr]     Checking crossbeam v0.3.0
Dec 19 15:59:03.933 INFO [stderr]     Checking mio v0.6.11
Dec 19 15:59:05.394 INFO [stderr]     Checking ws v0.7.3
Dec 19 15:59:07.210 INFO [stderr]     Checking sergaem v0.1.0 (/opt/crater/workdir)
Dec 19 15:59:07.552 INFO [stderr] warning: unused import: `std::cell::RefCell`
Dec 19 15:59:07.552 INFO [stderr]  --> src/engine/network.rs:2:5
Dec 19 15:59:07.552 INFO [stderr]   |
Dec 19 15:59:07.552 INFO [stderr] 2 | use std::cell::RefCell;
Dec 19 15:59:07.552 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 19 15:59:07.552 INFO [stderr]   |
Dec 19 15:59:07.552 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 15:59:07.552 INFO [stderr] 
Dec 19 15:59:07.686 INFO [stderr] warning: unused import: `std::cell::RefCell`
Dec 19 15:59:07.686 INFO [stderr]  --> src/engine/network.rs:2:5
Dec 19 15:59:07.686 INFO [stderr]   |
Dec 19 15:59:07.686 INFO [stderr] 2 | use std::cell::RefCell;
Dec 19 15:59:07.686 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 19 15:59:07.686 INFO [stderr]   |
Dec 19 15:59:07.686 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 15:59:07.686 INFO [stderr] 
Dec 19 15:59:07.732 INFO [stderr] warning: variable does not need to be mutable
Dec 19 15:59:07.732 INFO [stderr]   --> src/engine/game.rs:30:21
Dec 19 15:59:07.732 INFO [stderr]    |
Dec 19 15:59:07.732 INFO [stderr] 30 |                 let mut game_logic = GameLogic::new(self.clone());
Dec 19 15:59:07.732 INFO [stderr]    |                     ----^^^^^^^^^^
Dec 19 15:59:07.732 INFO [stderr]    |                     |
Dec 19 15:59:07.732 INFO [stderr]    |                     help: remove this `mut`
Dec 19 15:59:07.732 INFO [stderr]    |
Dec 19 15:59:07.732 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 15:59:07.732 INFO [stderr] 
Dec 19 15:59:07.732 INFO [stderr] warning: variable does not need to be mutable
Dec 19 15:59:07.732 INFO [stderr]   --> src/engine/game.rs:30:21
Dec 19 15:59:07.732 INFO [stderr]    |
Dec 19 15:59:07.732 INFO [stderr] 30 |                 let mut game_logic = GameLogic::new(self.clone());
Dec 19 15:59:07.732 INFO [stderr]    |                     ----^^^^^^^^^^
Dec 19 15:59:07.732 INFO [stderr]    |                     |
Dec 19 15:59:07.732 INFO [stderr]    |                     help: remove this `mut`
Dec 19 15:59:07.732 INFO [stderr] 
Dec 19 15:59:07.752 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:59:07.752 INFO [stderr]   --> src/engine/game.rs:72:13
Dec 19 15:59:07.752 INFO [stderr]    |
Dec 19 15:59:07.752 INFO [stderr] 72 |             player.send(Message::from(msg));
Dec 19 15:59:07.752 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:59:07.752 INFO [stderr]    |
Dec 19 15:59:07.752 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 15:59:07.752 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:59:07.752 INFO [stderr] 
Dec 19 15:59:07.886 INFO [stderr] warning: variable does not need to be mutable
Dec 19 15:59:07.886 INFO [stderr]   --> src/engine/game.rs:30:21
Dec 19 15:59:07.886 INFO [stderr]    |
Dec 19 15:59:07.886 INFO [stderr] 30 |                 let mut game_logic = GameLogic::new(self.clone());
Dec 19 15:59:07.886 INFO [stderr]    |                     ----^^^^^^^^^^
Dec 19 15:59:07.886 INFO [stderr]    |                     |
Dec 19 15:59:07.886 INFO [stderr]    |                     help: remove this `mut`
Dec 19 15:59:07.886 INFO [stderr]    |
Dec 19 15:59:07.886 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 15:59:07.886 INFO [stderr] 
Dec 19 15:59:07.886 INFO [stderr] warning: variable does not need to be mutable
Dec 19 15:59:07.886 INFO [stderr]   --> src/engine/game.rs:30:21
Dec 19 15:59:07.886 INFO [stderr]    |
Dec 19 15:59:07.886 INFO [stderr] 30 |                 let mut game_logic = GameLogic::new(self.clone());
Dec 19 15:59:07.886 INFO [stderr]    |                     ----^^^^^^^^^^
Dec 19 15:59:07.886 INFO [stderr]    |                     |
Dec 19 15:59:07.886 INFO [stderr]    |                     help: remove this `mut`
Dec 19 15:59:07.886 INFO [stderr] 
Dec 19 15:59:07.891 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:59:07.891 INFO [stderr]   --> src/engine/game.rs:72:13
Dec 19 15:59:07.891 INFO [stderr]    |
Dec 19 15:59:07.891 INFO [stderr] 72 |             player.send(Message::from(msg));
Dec 19 15:59:07.891 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:59:07.891 INFO [stderr]    |
Dec 19 15:59:07.891 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 15:59:07.891 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:59:07.891 INFO [stderr] 
Dec 19 15:59:07.923 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.06s
Dec 19 15:59:08.630 INFO running `"docker" "inspect" "57f10e0fee40fb7aef764c81a8a8699760a6e965faec4f538a25d5e7ae1a6bcd"`
Dec 19 15:59:08.914 INFO running `"docker" "rm" "-f" "57f10e0fee40fb7aef764c81a8a8699760a6e965faec4f538a25d5e7ae1a6bcd"`
Dec 19 15:59:09.172 INFO [stdout] 57f10e0fee40fb7aef764c81a8a8699760a6e965faec4f538a25d5e7ae1a6bcd