[INFO] fetching crate nc 0.7.13...
[INFO] checking nc-0.7.13 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate nc 0.7.13 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate nc 0.7.13 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nc 0.7.13
[INFO] finished tweaking crates.io crate nc 0.7.13
[INFO] tweaked toml for crates.io crate nc 0.7.13 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate nc 0.7.13 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b0748649c70ef2c2e73d51d229d3d49c783e00c296026755c301cae70721044a
[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" "b0748649c70ef2c2e73d51d229d3d49c783e00c296026755c301cae70721044a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b0748649c70ef2c2e73d51d229d3d49c783e00c296026755c301cae70721044a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0748649c70ef2c2e73d51d229d3d49c783e00c296026755c301cae70721044a", kill_on_drop: false }`
[INFO] [stdout] b0748649c70ef2c2e73d51d229d3d49c783e00c296026755c301cae70721044a
[INFO] running `Command { std: "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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5e22e58eb8179ad2ef92fbd5ddcbebd0fd1b34988ba5cac2e817b8f9f16ed3d
[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" "f5e22e58eb8179ad2ef92fbd5ddcbebd0fd1b34988ba5cac2e817b8f9f16ed3d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling nc v0.7.13 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `alarm`
[INFO] [stdout]   --> examples/utils/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn alarm(seconds: u32) -> Result<u32, nc::Errno> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `alarm`
[INFO] [stdout]   --> examples/utils/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn alarm(seconds: u32) -> Result<u32, nc::Errno> {
[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] [stdout] warning: function is never used: `alarm`
[INFO] [stdout]   --> examples/utils/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn alarm(seconds: u32) -> Result<u32, nc::Errno> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `handle_restore`
[INFO] [stdout]  --> examples/timer.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn handle_restore() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/socket.rs:39:5
[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::accept4(
[INFO] [stdout] ...  |
[INFO] [stdout] 36 | |         println!("conn_fd: {:?}", conn_fd);
[INFO] [stdout] 37 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 38 | 
[INFO] [stdout] 39 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.76s
[INFO] running `Command { std: "docker" "inspect" "f5e22e58eb8179ad2ef92fbd5ddcbebd0fd1b34988ba5cac2e817b8f9f16ed3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5e22e58eb8179ad2ef92fbd5ddcbebd0fd1b34988ba5cac2e817b8f9f16ed3d", kill_on_drop: false }`
[INFO] [stdout] f5e22e58eb8179ad2ef92fbd5ddcbebd0fd1b34988ba5cac2e817b8f9f16ed3d