[INFO] fetching crate nc 0.5.2...
[INFO] checking nc-0.5.2 against master#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920
[INFO] extracting crate nc 0.5.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate nc 0.5.2 on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nc 0.5.2
[INFO] finished tweaking crates.io crate nc 0.5.2
[INFO] tweaked toml for crates.io crate nc 0.5.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate nc 0.5.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b5e862a2186a6c66527803f7fbe3a6e391cf5a3bdce6b7edad5329067fc38084
[INFO] running `Command { std: "docker" "start" "-a" "b5e862a2186a6c66527803f7fbe3a6e391cf5a3bdce6b7edad5329067fc38084", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5e862a2186a6c66527803f7fbe3a6e391cf5a3bdce6b7edad5329067fc38084", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5e862a2186a6c66527803f7fbe3a6e391cf5a3bdce6b7edad5329067fc38084", kill_on_drop: false }`
[INFO] [stdout] b5e862a2186a6c66527803f7fbe3a6e391cf5a3bdce6b7edad5329067fc38084
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67d0c7bb83be82084e76f550165d22c850809ecfa7d0b14ee7052a81eb5df268
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "67d0c7bb83be82084e76f550165d22c850809ecfa7d0b14ee7052a81eb5df268", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.62
[INFO] [stderr]    Compiling nc v0.5.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/socket.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | /     loop {
[INFO] [stdout] 28 | |         let mut conn_addr = nc::sockaddr_in_t::default();
[INFO] [stdout] 29 | |         let mut conn_addr_len: nc::socklen_t = 0;
[INFO] [stdout] 30 | |         let conn_fd = nc::accept(listen_fd, &mut conn_addr, &mut conn_addr_len)?;
[INFO] [stdout] 31 | |         println!("conn_fd: {:?}", conn_fd);
[INFO] [stdout] 32 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 33 | 
[INFO] [stdout] 34 |       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 7.25s
[INFO] running `Command { std: "docker" "inspect" "67d0c7bb83be82084e76f550165d22c850809ecfa7d0b14ee7052a81eb5df268", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67d0c7bb83be82084e76f550165d22c850809ecfa7d0b14ee7052a81eb5df268", kill_on_drop: false }`
[INFO] [stdout] 67d0c7bb83be82084e76f550165d22c850809ecfa7d0b14ee7052a81eb5df268