[INFO] cloning repository https://github.com/lipwei1808/concurrent-tcp-server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lipwei1808/concurrent-tcp-server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flipwei1808%2Fconcurrent-tcp-server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flipwei1808%2Fconcurrent-tcp-server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2c104ab09b1f086908cf31790cc6063466fc0b87
[INFO] checking lipwei1808/concurrent-tcp-server against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flipwei1808%2Fconcurrent-tcp-server" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lipwei1808/concurrent-tcp-server on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lipwei1808/concurrent-tcp-server
[INFO] finished tweaking git repo https://github.com/lipwei1808/concurrent-tcp-server
[INFO] tweaked toml for git repo https://github.com/lipwei1808/concurrent-tcp-server written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/lipwei1808/concurrent-tcp-server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ae92b5e850ed7c2970da91b43ca39e521850148fbc2efa243af727d55238038
[INFO] running `Command { std: "docker" "start" "-a" "5ae92b5e850ed7c2970da91b43ca39e521850148fbc2efa243af727d55238038", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ae92b5e850ed7c2970da91b43ca39e521850148fbc2efa243af727d55238038", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ae92b5e850ed7c2970da91b43ca39e521850148fbc2efa243af727d55238038", kill_on_drop: false }`
[INFO] [stdout] 5ae92b5e850ed7c2970da91b43ca39e521850148fbc2efa243af727d55238038
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7af51b937c30f5f87917359ecc02f108adc194d49a067a21998546278d2659a2
[INFO] running `Command { std: "docker" "start" "-a" "7af51b937c30f5f87917359ecc02f108adc194d49a067a21998546278d2659a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking socket2 v0.5.6
[INFO] [stderr]     Checking mio v0.8.11
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_xoshiro v0.6.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.53
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]     Checking tokio v1.36.0
[INFO] [stderr]     Checking cs3211_assignment_3 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated constant `DATA_LIMIT` is never used
[INFO] [stdout]   --> src/task.rs:44:11
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl Task {
[INFO] [stdout]    | --------- associated constant in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 44 |     const DATA_LIMIT: u64 = u8::MAX as u64;
[INFO] [stdout]    |           ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constant `DATA_LIMIT` is never used
[INFO] [stdout]   --> src/task.rs:44:11
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl Task {
[INFO] [stdout]    | --------- associated constant in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 44 |     const DATA_LIMIT: u64 = u8::MAX as u64;
[INFO] [stdout]    |           ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.47s
[INFO] running `Command { std: "docker" "inspect" "7af51b937c30f5f87917359ecc02f108adc194d49a067a21998546278d2659a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7af51b937c30f5f87917359ecc02f108adc194d49a067a21998546278d2659a2", kill_on_drop: false }`
[INFO] [stdout] 7af51b937c30f5f87917359ecc02f108adc194d49a067a21998546278d2659a2
[INFO] checking lipwei1808/concurrent-tcp-server against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flipwei1808%2Fconcurrent-tcp-server" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lipwei1808/concurrent-tcp-server on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lipwei1808/concurrent-tcp-server
[INFO] finished tweaking git repo https://github.com/lipwei1808/concurrent-tcp-server
[INFO] tweaked toml for git repo https://github.com/lipwei1808/concurrent-tcp-server written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/lipwei1808/concurrent-tcp-server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 403976a25215f1f53c1455fec47478aa40d0a3bc6449ebf852460e6ff390b149
[INFO] running `Command { std: "docker" "start" "-a" "403976a25215f1f53c1455fec47478aa40d0a3bc6449ebf852460e6ff390b149", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "403976a25215f1f53c1455fec47478aa40d0a3bc6449ebf852460e6ff390b149", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "403976a25215f1f53c1455fec47478aa40d0a3bc6449ebf852460e6ff390b149", kill_on_drop: false }`
[INFO] [stdout] 403976a25215f1f53c1455fec47478aa40d0a3bc6449ebf852460e6ff390b149
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c975628016f837ec2259464e0ed847adc982c43810e19206e3db9bcfef6b280f
[INFO] running `Command { std: "docker" "start" "-a" "c975628016f837ec2259464e0ed847adc982c43810e19206e3db9bcfef6b280f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking socket2 v0.5.6
[INFO] [stderr]     Checking mio v0.8.11
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_xoshiro v0.6.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.53
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]     Checking tokio v1.36.0
[INFO] [stderr]     Checking cs3211_assignment_3 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated constant `DATA_LIMIT` is never used
[INFO] [stdout]   --> src/task.rs:44:11
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl Task {
[INFO] [stdout]    | --------- associated constant in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 44 |     const DATA_LIMIT: u64 = u8::MAX as u64;
[INFO] [stdout]    |           ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constant `DATA_LIMIT` is never used
[INFO] [stdout]   --> src/task.rs:44:11
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl Task {
[INFO] [stdout]    | --------- associated constant in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 44 |     const DATA_LIMIT: u64 = u8::MAX as u64;
[INFO] [stdout]    |           ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.60s
[INFO] running `Command { std: "docker" "inspect" "c975628016f837ec2259464e0ed847adc982c43810e19206e3db9bcfef6b280f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c975628016f837ec2259464e0ed847adc982c43810e19206e3db9bcfef6b280f", kill_on_drop: false }`
[INFO] [stdout] c975628016f837ec2259464e0ed847adc982c43810e19206e3db9bcfef6b280f