[INFO] cloning repository https://github.com/songhaoxin/simple-tcp-echo-server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/songhaoxin/simple-tcp-echo-server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsonghaoxin%2Fsimple-tcp-echo-server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsonghaoxin%2Fsimple-tcp-echo-server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f1f95008231cdf69608ac51b88d18e0d37d91a35
[INFO] testing songhaoxin/simple-tcp-echo-server against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsonghaoxin%2Fsimple-tcp-echo-server" "/workspace/builds/worker-79/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-79/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/songhaoxin/simple-tcp-echo-server on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/songhaoxin/simple-tcp-echo-server
[INFO] finished tweaking git repo https://github.com/songhaoxin/simple-tcp-echo-server
[INFO] tweaked toml for git repo https://github.com/songhaoxin/simple-tcp-echo-server written to /workspace/builds/worker-79/source/Cargo.toml
[INFO] crate git repo https://github.com/songhaoxin/simple-tcp-echo-server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 82675eca2d5a7c9fe9359c237219383caf4a1cc42f696d332f118a4e22e94624
[INFO] running `Command { std: "docker" "start" "-a" "82675eca2d5a7c9fe9359c237219383caf4a1cc42f696d332f118a4e22e94624", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82675eca2d5a7c9fe9359c237219383caf4a1cc42f696d332f118a4e22e94624", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82675eca2d5a7c9fe9359c237219383caf4a1cc42f696d332f118a4e22e94624", kill_on_drop: false }`
[INFO] [stdout] 82675eca2d5a7c9fe9359c237219383caf4a1cc42f696d332f118a4e22e94624
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73552ffd833dbd49931953e70e235b2a785b07f5d26612031aaca481313763f2
[INFO] running `Command { std: "docker" "start" "-a" "73552ffd833dbd49931953e70e235b2a785b07f5d26612031aaca481313763f2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling tcp-echo-server v0.1.0 (/opt/rustwide/workdir/tcp-echo-server)
[INFO] [stderr]    Compiling tcp-echo-client v0.1.0 (/opt/rustwide/workdir/tcp-echo-client)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> tcp-echo-client/src/main.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | /     loop {
[INFO] [stdout] 8  | |         let mut input = String::new();
[INFO] [stdout] 9  | |         io::stdin()
[INFO] [stdout] 10 | |             .read_line(&mut input)
[INFO] [stdout] ...  |
[INFO] [stdout] 23 | |         println!("");
[INFO] [stdout] 24 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 25 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.36s
[INFO] running `Command { std: "docker" "inspect" "73552ffd833dbd49931953e70e235b2a785b07f5d26612031aaca481313763f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73552ffd833dbd49931953e70e235b2a785b07f5d26612031aaca481313763f2", kill_on_drop: false }`
[INFO] [stdout] 73552ffd833dbd49931953e70e235b2a785b07f5d26612031aaca481313763f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92fe1dbbd4456cb7cf018398cc6b6f2f9b5da9e89986052893291406795cef12
[INFO] running `Command { std: "docker" "start" "-a" "92fe1dbbd4456cb7cf018398cc6b6f2f9b5da9e89986052893291406795cef12", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling tcp-echo-server v0.1.0 (/opt/rustwide/workdir/tcp-echo-server)
[INFO] [stderr]    Compiling tcp-echo-client v0.1.0 (/opt/rustwide/workdir/tcp-echo-client)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> tcp-echo-client/src/main.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | /     loop {
[INFO] [stdout] 8  | |         let mut input = String::new();
[INFO] [stdout] 9  | |         io::stdin()
[INFO] [stdout] 10 | |             .read_line(&mut input)
[INFO] [stdout] ...  |
[INFO] [stdout] 23 | |         println!("");
[INFO] [stdout] 24 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 25 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `Command { std: "docker" "inspect" "92fe1dbbd4456cb7cf018398cc6b6f2f9b5da9e89986052893291406795cef12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92fe1dbbd4456cb7cf018398cc6b6f2f9b5da9e89986052893291406795cef12", kill_on_drop: false }`
[INFO] [stdout] 92fe1dbbd4456cb7cf018398cc6b6f2f9b5da9e89986052893291406795cef12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 99d55f5a1ddf7a87f23b0dfa1a3e473ed2f9066f3416ab6ff53bf9cefe7a08f3
[INFO] running `Command { std: "docker" "start" "-a" "99d55f5a1ddf7a87f23b0dfa1a3e473ed2f9066f3416ab6ff53bf9cefe7a08f3", kill_on_drop: false }`
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> tcp-echo-client/src/main.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 7  | /     loop {
[INFO] [stderr] 8  | |         let mut input = String::new();
[INFO] [stderr] 9  | |         io::stdin()
[INFO] [stderr] 10 | |             .read_line(&mut input)
[INFO] [stderr] ...  |
[INFO] [stderr] 23 | |         println!("");
[INFO] [stderr] 24 | |     }
[INFO] [stderr]    | |_____- any code following this expression is unreachable
[INFO] [stderr] 25 |       Ok(())
[INFO] [stderr]    |       ^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tcp-echo-client` (bin "tcp-echo-client" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tcp_echo_client-65127347113d0e04)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tcp_echo_server-e3a031e65e5baa14)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "99d55f5a1ddf7a87f23b0dfa1a3e473ed2f9066f3416ab6ff53bf9cefe7a08f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99d55f5a1ddf7a87f23b0dfa1a3e473ed2f9066f3416ab6ff53bf9cefe7a08f3", kill_on_drop: false }`
[INFO] [stdout] 99d55f5a1ddf7a87f23b0dfa1a3e473ed2f9066f3416ab6ff53bf9cefe7a08f3