[INFO] cloning repository https://github.com/Shourya742/tcp_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Shourya742/tcp_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShourya742%2Ftcp_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShourya742%2Ftcp_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 363e5e9b99607c3701ad902550aadd86255a6446
[INFO] checking Shourya742/tcp_rust against try#b4c55082edd8dec08ce8af276d7054d9c4db20c4 for pr-147984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShourya742%2Ftcp_rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Shourya742/tcp_rust
[INFO] finished tweaking git repo https://github.com/Shourya742/tcp_rust
[INFO] tweaked toml for git repo https://github.com/Shourya742/tcp_rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Shourya742/tcp_rust on toolchain b4c55082edd8dec08ce8af276d7054d9c4db20c4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Shourya742/tcp_rust 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" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking Shourya742/tcp_rust against try#b4c55082edd8dec08ce8af276d7054d9c4db20c4 for pr-147984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShourya742%2Ftcp_rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Shourya742/tcp_rust
[INFO] finished tweaking git repo https://github.com/Shourya742/tcp_rust
[INFO] tweaked toml for git repo https://github.com/Shourya742/tcp_rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Shourya742/tcp_rust on toolchain b4c55082edd8dec08ce8af276d7054d9c4db20c4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Shourya742/tcp_rust 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" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-fs v0.1.7
[INFO] [stderr]   Downloaded tokio-core v0.1.18
[INFO] [stderr]   Downloaded etherparse v0.16.0
[INFO] [stderr]   Downloaded tokio-uds v0.2.7
[INFO] [stderr]   Downloaded tun-tap v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 37caba5b6a12591a6605b18ac2e6dcfdc91a0b2904733d055fbbb2f634a0c54d
[INFO] running `Command { std: "docker" "start" "-a" "37caba5b6a12591a6605b18ac2e6dcfdc91a0b2904733d055fbbb2f634a0c54d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37caba5b6a12591a6605b18ac2e6dcfdc91a0b2904733d055fbbb2f634a0c54d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37caba5b6a12591a6605b18ac2e6dcfdc91a0b2904733d055fbbb2f634a0c54d", kill_on_drop: false }`
[INFO] [stdout] 37caba5b6a12591a6605b18ac2e6dcfdc91a0b2904733d055fbbb2f634a0c54d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e41b8205994da25c602edcec2a2196b71281ea2fe2dd36446e2b3568d3781dfc
[INFO] running `Command { std: "docker" "start" "-a" "e41b8205994da25c602edcec2a2196b71281ea2fe2dd36446e2b3568d3781dfc", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling tun-tap v0.1.4
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking scoped-tls v0.1.2
[INFO] [stderr]     Checking arrayvec v0.7.6
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking etherparse v0.16.0
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stderr]     Checking crossbeam-deque v0.7.4
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tokio-core v0.1.18
[INFO] [stderr]     Checking tcp_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | /     loop {
[INFO] [stdout] 14 | |         let nbytes = nic.recv(&mut buf[..])?;
[INFO] [stdout] 15 | |         let eth_flags = u16::from_be_bytes([buf[0], buf[1]]);
[INFO] [stdout] 16 | |         let eth_proto = u16::from_be_bytes([buf[2], buf[3]]);
[INFO] [stdout] ...  |
[INFO] [stdout] 62 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 63 |
[INFO] [stdout] 64 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `datai`
[INFO] [stdout]   --> src/main.rs:32:29
[INFO] [stdout]    |
[INFO] [stdout] 32 |                         let datai = 4 + iph.slice().len() + tcph.slice().len();
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_datai`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | /     loop {
[INFO] [stdout] 14 | |         let nbytes = nic.recv(&mut buf[..])?;
[INFO] [stdout] 15 | |         let eth_flags = u16::from_be_bytes([buf[0], buf[1]]);
[INFO] [stdout] 16 | |         let eth_proto = u16::from_be_bytes([buf[2], buf[3]]);
[INFO] [stdout] ...  |
[INFO] [stdout] 62 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 63 |
[INFO] [stdout] 64 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `datai`
[INFO] [stdout]   --> src/main.rs:32:29
[INFO] [stdout]    |
[INFO] [stdout] 32 |                         let datai = 4 + iph.slice().len() + tcph.slice().len();
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_datai`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.48s
[INFO] running `Command { std: "docker" "inspect" "e41b8205994da25c602edcec2a2196b71281ea2fe2dd36446e2b3568d3781dfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e41b8205994da25c602edcec2a2196b71281ea2fe2dd36446e2b3568d3781dfc", kill_on_drop: false }`
[INFO] [stdout] e41b8205994da25c602edcec2a2196b71281ea2fe2dd36446e2b3568d3781dfc