Dec 19 14:12:59.810 INFO checking knknkn1162/rust_server_test against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 14:12:59.811 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/knknkn1162/rust_server_test:/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 14:13:00.051 INFO [stdout] c17e7061b4a13fec85365d180b4766505b7253582c2409c53617d70b9fd25379
Dec 19 14:13:00.059 INFO running `"docker" "start" "-a" "c17e7061b4a13fec85365d180b4766505b7253582c2409c53617d70b9fd25379"`
Dec 19 14:13:00.872 INFO [stderr]     Checking env_logger v0.4.3
Dec 19 14:13:01.244 INFO [stderr]     Checking simple_line v0.1.0 (/opt/crater/workdir)
Dec 19 14:13:01.812 INFO [stderr] warning: unused import: `Future`
Dec 19 14:13:01.812 INFO [stderr]   --> src/main.rs:16:23
Dec 19 14:13:01.812 INFO [stderr]    |
Dec 19 14:13:01.812 INFO [stderr] 16 | use futures::{future, Future};
Dec 19 14:13:01.812 INFO [stderr]    |                       ^^^^^^
Dec 19 14:13:01.812 INFO [stderr]    |
Dec 19 14:13:01.812 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 19 14:13:01.812 INFO [stderr] 
Dec 19 14:13:01.812 INFO [stderr] warning: unused import: `Future`
Dec 19 14:13:01.812 INFO [stderr]   --> src/main.rs:16:23
Dec 19 14:13:01.812 INFO [stderr]    |
Dec 19 14:13:01.812 INFO [stderr] 16 | use futures::{future, Future};
Dec 19 14:13:01.812 INFO [stderr]    |                       ^^^^^^
Dec 19 14:13:01.812 INFO [stderr]    |
Dec 19 14:13:01.812 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 19 14:13:01.812 INFO [stderr] 
Dec 19 14:13:01.840 INFO [stderr] warning: variable does not need to be mutable
Dec 19 14:13:01.840 INFO [stderr]    --> src/main.rs:151:9
Dec 19 14:13:01.840 INFO [stderr]     |
Dec 19 14:13:01.840 INFO [stderr] 151 |     let mut server = TcpServer::new(Http, addr);
Dec 19 14:13:01.840 INFO [stderr]     |         ----^^^^^^
Dec 19 14:13:01.840 INFO [stderr]     |         |
Dec 19 14:13:01.840 INFO [stderr]     |         help: remove this `mut`
Dec 19 14:13:01.840 INFO [stderr]     |
Dec 19 14:13:01.840 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 14:13:01.840 INFO [stderr] 
Dec 19 14:13:01.860 INFO [stderr] warning: variable does not need to be mutable
Dec 19 14:13:01.860 INFO [stderr]    --> src/main.rs:151:9
Dec 19 14:13:01.860 INFO [stderr]     |
Dec 19 14:13:01.860 INFO [stderr] 151 |     let mut server = TcpServer::new(Http, addr);
Dec 19 14:13:01.860 INFO [stderr]     |         ----^^^^^^
Dec 19 14:13:01.860 INFO [stderr]     |         |
Dec 19 14:13:01.860 INFO [stderr]     |         help: remove this `mut`
Dec 19 14:13:01.860 INFO [stderr]     |
Dec 19 14:13:01.860 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 14:13:01.860 INFO [stderr] 
Dec 19 14:13:01.936 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
Dec 19 14:13:02.398 INFO running `"docker" "inspect" "c17e7061b4a13fec85365d180b4766505b7253582c2409c53617d70b9fd25379"`
Dec 19 14:13:02.570 INFO running `"docker" "rm" "-f" "c17e7061b4a13fec85365d180b4766505b7253582c2409c53617d70b9fd25379"`
Dec 19 14:13:02.876 INFO [stdout] c17e7061b4a13fec85365d180b4766505b7253582c2409c53617d70b9fd25379