Dec 19 16:46:19.417 INFO checking ftlc/RustMessenger against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 16:46:19.417 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/ftlc/RustMessenger:/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 16:46:20.472 INFO [stdout] 39b5f29da4b2e31097862d9a7ea1d708675766c0f5ed57a09ba0564438e4eab2
Dec 19 16:46:20.478 INFO running `"docker" "start" "-a" "39b5f29da4b2e31097862d9a7ea1d708675766c0f5ed57a09ba0564438e4eab2"`
Dec 19 16:46:21.836 INFO [stderr]     Checking iovec v0.1.0
Dec 19 16:46:22.148 INFO [stderr]     Checking mio v0.6.6
Dec 19 16:46:23.452 INFO [stderr]     Checking Server v0.1.0 (/opt/crater/workdir)
Dec 19 16:46:23.713 INFO [stderr] warning: unused import: `std::io`
Dec 19 16:46:23.713 INFO [stderr]  --> src/main.rs:5:5
Dec 19 16:46:23.713 INFO [stderr]   |
Dec 19 16:46:23.713 INFO [stderr] 5 | use std::io;
Dec 19 16:46:23.713 INFO [stderr]   |     ^^^^^^^
Dec 19 16:46:23.713 INFO [stderr]   |
Dec 19 16:46:23.713 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 16:46:23.713 INFO [stderr] 
Dec 19 16:46:23.713 INFO [stderr] warning: unused import: `SocketAddr`
Dec 19 16:46:23.713 INFO [stderr]  --> src/main.rs:7:27
Dec 19 16:46:23.717 INFO [stderr]   |
Dec 19 16:46:23.717 INFO [stderr] 7 | use std::net::{TcpStream, SocketAddr};
Dec 19 16:46:23.717 INFO [stderr]   |                           ^^^^^^^^^^
Dec 19 16:46:23.717 INFO [stderr] 
Dec 19 16:46:23.717 INFO [stderr] warning: unused imports: `BufRead`, `BufReader`, `Read`
Dec 19 16:46:23.717 INFO [stderr]  --> src/main.rs:9:15
Dec 19 16:46:23.717 INFO [stderr]   |
Dec 19 16:46:23.717 INFO [stderr] 9 | use std::io::{Read, Write, BufReader, BufRead};
Dec 19 16:46:23.717 INFO [stderr]   |               ^^^^         ^^^^^^^^^  ^^^^^^^
Dec 19 16:46:23.717 INFO [stderr] 
Dec 19 16:46:23.725 INFO [stderr] warning: unused import: `std::io`
Dec 19 16:46:23.725 INFO [stderr]  --> src/main.rs:5:5
Dec 19 16:46:23.725 INFO [stderr]   |
Dec 19 16:46:23.725 INFO [stderr] 5 | use std::io;
Dec 19 16:46:23.725 INFO [stderr]   |     ^^^^^^^
Dec 19 16:46:23.725 INFO [stderr]   |
Dec 19 16:46:23.726 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 16:46:23.726 INFO [stderr] 
Dec 19 16:46:23.726 INFO [stderr] warning: unused import: `SocketAddr`
Dec 19 16:46:23.726 INFO [stderr]  --> src/main.rs:7:27
Dec 19 16:46:23.726 INFO [stderr]   |
Dec 19 16:46:23.726 INFO [stderr] 7 | use std::net::{TcpStream, SocketAddr};
Dec 19 16:46:23.726 INFO [stderr]   |                           ^^^^^^^^^^
Dec 19 16:46:23.726 INFO [stderr] 
Dec 19 16:46:23.732 INFO [stderr] warning: unused imports: `BufRead`, `BufReader`, `Read`
Dec 19 16:46:23.732 INFO [stderr]  --> src/main.rs:9:15
Dec 19 16:46:23.732 INFO [stderr]   |
Dec 19 16:46:23.732 INFO [stderr] 9 | use std::io::{Read, Write, BufReader, BufRead};
Dec 19 16:46:23.732 INFO [stderr]   |               ^^^^         ^^^^^^^^^  ^^^^^^^
Dec 19 16:46:23.732 INFO [stderr] 
Dec 19 16:46:23.774 INFO [stderr] warning: variable does not need to be mutable
Dec 19 16:46:23.774 INFO [stderr]   --> src/main.rs:36:19
Dec 19 16:46:23.774 INFO [stderr]    |
Dec 19 16:46:23.774 INFO [stderr] 36 | fn handle_request(mut stream: TcpStream) {
Dec 19 16:46:23.774 INFO [stderr]    |                   ----^^^^^^
Dec 19 16:46:23.774 INFO [stderr]    |                   |
Dec 19 16:46:23.774 INFO [stderr]    |                   help: remove this `mut`
Dec 19 16:46:23.774 INFO [stderr]    |
Dec 19 16:46:23.774 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 16:46:23.774 INFO [stderr] 
Dec 19 16:46:23.774 INFO [stderr] warning: crate `Server` should have a snake case name such as `server`
Dec 19 16:46:23.774 INFO [stderr]   |
Dec 19 16:46:23.774 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 19 16:46:23.774 INFO [stderr] 
Dec 19 16:46:23.811 INFO [stderr] warning: variable does not need to be mutable
Dec 19 16:46:23.811 INFO [stderr]   --> src/main.rs:36:19
Dec 19 16:46:23.811 INFO [stderr]    |
Dec 19 16:46:23.811 INFO [stderr] 36 | fn handle_request(mut stream: TcpStream) {
Dec 19 16:46:23.811 INFO [stderr]    |                   ----^^^^^^
Dec 19 16:46:23.811 INFO [stderr]    |                   |
Dec 19 16:46:23.812 INFO [stderr]    |                   help: remove this `mut`
Dec 19 16:46:23.812 INFO [stderr]    |
Dec 19 16:46:23.812 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 16:46:23.812 INFO [stderr] 
Dec 19 16:46:23.812 INFO [stderr] warning: crate `Server` should have a snake case name such as `server`
Dec 19 16:46:23.812 INFO [stderr]   |
Dec 19 16:46:23.812 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 19 16:46:23.812 INFO [stderr] 
Dec 19 16:46:23.836 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.06s
Dec 19 16:46:24.350 INFO running `"docker" "inspect" "39b5f29da4b2e31097862d9a7ea1d708675766c0f5ed57a09ba0564438e4eab2"`
Dec 19 16:46:24.594 INFO running `"docker" "rm" "-f" "39b5f29da4b2e31097862d9a7ea1d708675766c0f5ed57a09ba0564438e4eab2"`
Dec 19 16:46:24.838 INFO [stdout] 39b5f29da4b2e31097862d9a7ea1d708675766c0f5ed57a09ba0564438e4eab2