Dec 17 13:55:54.169 INFO checking tera3939/rustcp_client against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 13:55:54.169 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/tera3939/rustcp_client:/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 13:55:54.696 INFO [stdout] b5ffa0cfbf88e89457a6a2fd6f63532e6358a1199f899ecf7daa815b7c67ef15
Dec 17 13:55:54.698 INFO running `"docker" "start" "-a" "b5ffa0cfbf88e89457a6a2fd6f63532e6358a1199f899ecf7daa815b7c67ef15"`
Dec 17 13:55:57.396 INFO [stderr]     Checking rustcp_client v0.1.0 (/opt/crater/workdir)
Dec 17 13:55:57.648 INFO [stderr] warning: unused variable: `buffer`
Dec 17 13:55:57.648 INFO [stderr]   --> src/main.rs:12:13
Dec 17 13:55:57.648 INFO [stderr]    |
Dec 17 13:55:57.648 INFO [stderr] 12 |     let mut buffer = String::new();
Dec 17 13:55:57.648 INFO [stderr]    |             ^^^^^^ help: consider using `_buffer` instead
Dec 17 13:55:57.648 INFO [stderr]    |
Dec 17 13:55:57.648 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 13:55:57.648 INFO [stderr] 
Dec 17 13:55:57.664 INFO [stderr] warning: variable does not need to be mutable
Dec 17 13:55:57.665 INFO [stderr]   --> src/main.rs:12:9
Dec 17 13:55:57.665 INFO [stderr]    |
Dec 17 13:55:57.665 INFO [stderr] 12 |     let mut buffer = String::new();
Dec 17 13:55:57.665 INFO [stderr]    |         ----^^^^^^
Dec 17 13:55:57.666 INFO [stderr]    |         |
Dec 17 13:55:57.666 INFO [stderr]    |         help: remove this `mut`
Dec 17 13:55:57.666 INFO [stderr]    |
Dec 17 13:55:57.666 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 13:55:57.667 INFO [stderr] 
Dec 17 13:55:57.703 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 13:55:57.703 INFO [stderr]   --> src/main.rs:18:21
Dec 17 13:55:57.703 INFO [stderr]    |
Dec 17 13:55:57.703 INFO [stderr] 18 |                     stream.write(buffer.as_bytes());
Dec 17 13:55:57.703 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 13:55:57.703 INFO [stderr]    |
Dec 17 13:55:57.703 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 13:55:57.703 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 13:55:57.704 INFO [stderr] 
Dec 17 13:55:57.729 INFO [stderr] warning: unused variable: `buffer`
Dec 17 13:55:57.729 INFO [stderr]   --> src/main.rs:12:13
Dec 17 13:55:57.730 INFO [stderr]    |
Dec 17 13:55:57.730 INFO [stderr] 12 |     let mut buffer = String::new();
Dec 17 13:55:57.730 INFO [stderr]    |             ^^^^^^ help: consider using `_buffer` instead
Dec 17 13:55:57.730 INFO [stderr]    |
Dec 17 13:55:57.730 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 13:55:57.730 INFO [stderr] 
Dec 17 13:55:57.736 INFO [stderr] warning: variable does not need to be mutable
Dec 17 13:55:57.740 INFO [stderr]   --> src/main.rs:12:9
Dec 17 13:55:57.740 INFO [stderr]    |
Dec 17 13:55:57.740 INFO [stderr] 12 |     let mut buffer = String::new();
Dec 17 13:55:57.740 INFO [stderr]    |         ----^^^^^^
Dec 17 13:55:57.740 INFO [stderr]    |         |
Dec 17 13:55:57.740 INFO [stderr]    |         help: remove this `mut`
Dec 17 13:55:57.740 INFO [stderr]    |
Dec 17 13:55:57.740 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 13:55:57.740 INFO [stderr] 
Dec 17 13:55:57.758 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 13:55:57.758 INFO [stderr]   --> src/main.rs:18:21
Dec 17 13:55:57.758 INFO [stderr]    |
Dec 17 13:55:57.758 INFO [stderr] 18 |                     stream.write(buffer.as_bytes());
Dec 17 13:55:57.758 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 13:55:57.758 INFO [stderr]    |
Dec 17 13:55:57.758 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 13:55:57.758 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 13:55:57.758 INFO [stderr] 
Dec 17 13:55:57.789 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
Dec 17 13:55:58.890 INFO running `"docker" "inspect" "b5ffa0cfbf88e89457a6a2fd6f63532e6358a1199f899ecf7daa815b7c67ef15"`
Dec 17 13:55:59.294 INFO running `"docker" "rm" "-f" "b5ffa0cfbf88e89457a6a2fd6f63532e6358a1199f899ecf7daa815b7c67ef15"`
Dec 17 13:55:59.576 INFO [stdout] b5ffa0cfbf88e89457a6a2fd6f63532e6358a1199f899ecf7daa815b7c67ef15