[INFO] cloning repository https://github.com/julianbieber/TcpServerSpeedtest
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/julianbieber/TcpServerSpeedtest" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjulianbieber%2FTcpServerSpeedtest"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjulianbieber%2FTcpServerSpeedtest'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ac161080445d5b0ad49120960c420ef8651a5f19
[INFO] checking julianbieber/TcpServerSpeedtest against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjulianbieber%2FTcpServerSpeedtest" "/workspace/builds/worker-10/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/julianbieber/TcpServerSpeedtest on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/julianbieber/TcpServerSpeedtest
[INFO] finished tweaking git repo https://github.com/julianbieber/TcpServerSpeedtest
[INFO] tweaked toml for git repo https://github.com/julianbieber/TcpServerSpeedtest written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/julianbieber/TcpServerSpeedtest already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7e9896a2298f8afe3cc7552ae5b2058db5ea5f059c03ef2f038e00bd02205d74
[INFO] running `"docker" "start" "-a" "7e9896a2298f8afe3cc7552ae5b2058db5ea5f059c03ef2f038e00bd02205d74"`
[INFO] [stderr]     Checking tcp_server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | /     loop {
[INFO] [stderr] 6 | |         stream.write(data)?;
[INFO] [stderr] 7 | |         stream.flush();
[INFO] [stderr] 8 | |     };
[INFO] [stderr]   | |_____- any code following this expression is unreachable
[INFO] [stderr] 9 |       Ok(0)
[INFO] [stderr]   |       ^^^^^ unreachable expression
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |         stream.flush();
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | /     loop {
[INFO] [stderr] 6 | |         stream.write(data)?;
[INFO] [stderr] 7 | |         stream.flush();
[INFO] [stderr] 8 | |     };
[INFO] [stderr]   | |_____- any code following this expression is unreachable
[INFO] [stderr] 9 |       Ok(0)
[INFO] [stderr]   |       ^^^^^ unreachable expression
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |         stream.flush();
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `"docker" "inspect" "7e9896a2298f8afe3cc7552ae5b2058db5ea5f059c03ef2f038e00bd02205d74"`
[INFO] running `"docker" "rm" "-f" "7e9896a2298f8afe3cc7552ae5b2058db5ea5f059c03ef2f038e00bd02205d74"`
[INFO] [stdout] 7e9896a2298f8afe3cc7552ae5b2058db5ea5f059c03ef2f038e00bd02205d74