[INFO] fetching crate nc 0.4.10...
[INFO] checking nc-0.4.10 against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] extracting crate nc 0.4.10 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate nc 0.4.10 on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate nc 0.4.10
[INFO] finished tweaking crates.io crate nc 0.4.10
[INFO] tweaked toml for crates.io crate nc 0.4.10 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate nc 0.4.10 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 03430b7d1846a9d8c3815dd74bc10259fff2e8eca58cb16749e1d3c469fb10a3
[INFO] running `"docker" "start" "-a" "03430b7d1846a9d8c3815dd74bc10259fff2e8eca58cb16749e1d3c469fb10a3"`
[INFO] [stderr]    Compiling nc v0.4.10 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> examples/socket.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 27 | /     loop {
[INFO] [stderr] 28 | |         let mut conn_addr = nc::sockaddr_in_t::default();
[INFO] [stderr] 29 | |         let mut conn_addr_len: nc::socklen_t = 0;
[INFO] [stderr] 30 | |         let conn_fd = nc::accept(listen_fd, &mut conn_addr, &mut conn_addr_len)?;
[INFO] [stderr] 31 | |         println!("conn_fd: {:?}", conn_fd);
[INFO] [stderr] 32 | |     }
[INFO] [stderr]    | |_____- any code following this expression is unreachable
[INFO] [stderr] 33 | 
[INFO] [stderr] 34 |       return Ok(());
[INFO] [stderr]    |       ^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `KEY_SPACE`
[INFO] [stderr]   --> examples/keyboard.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | const KEY_SPACE: usize = 57;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.26s
[INFO] running `"docker" "inspect" "03430b7d1846a9d8c3815dd74bc10259fff2e8eca58cb16749e1d3c469fb10a3"`
[INFO] running `"docker" "rm" "-f" "03430b7d1846a9d8c3815dd74bc10259fff2e8eca58cb16749e1d3c469fb10a3"`
[INFO] [stdout] 03430b7d1846a9d8c3815dd74bc10259fff2e8eca58cb16749e1d3c469fb10a3