[INFO] fetching crate nc 0.7.6...
[INFO] checking nc-0.7.6 against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] extracting crate nc 0.7.6 into /workspace/builds/worker-72/source
[INFO] validating manifest of crates.io crate nc 0.7.6 on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nc 0.7.6
[INFO] finished tweaking crates.io crate nc 0.7.6
[INFO] tweaked toml for crates.io crate nc 0.7.6 written to /workspace/builds/worker-72/source/Cargo.toml
[INFO] crate crates.io crate nc 0.7.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c5190776acf54e9a2dfd142c1fc17a9408ac3ef85234d0e81f1e15e2eaa10dba
[INFO] running `Command { std: "docker" "start" "-a" "c5190776acf54e9a2dfd142c1fc17a9408ac3ef85234d0e81f1e15e2eaa10dba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5190776acf54e9a2dfd142c1fc17a9408ac3ef85234d0e81f1e15e2eaa10dba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5190776acf54e9a2dfd142c1fc17a9408ac3ef85234d0e81f1e15e2eaa10dba", kill_on_drop: false }`
[INFO] [stdout] c5190776acf54e9a2dfd142c1fc17a9408ac3ef85234d0e81f1e15e2eaa10dba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8a531af5eb500c1957c0e6b4c749a979b114784aebc063e5b34519f8f0a87ae2
[INFO] running `Command { std: "docker" "start" "-a" "8a531af5eb500c1957c0e6b4c749a979b114784aebc063e5b34519f8f0a87ae2", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]    Compiling nc v0.7.6 (/tmp/fixit)
[INFO] [stderr]    Migrating build.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/stat.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/resource_limit.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/strerror.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/tee.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/file.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/keyboard.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/dir.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/timer.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/meminfo.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/getcwd.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/sendfile.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/uname.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/read.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/alarm.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/getgroups.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/page_size.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/socket.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/open.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/prctl.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/mount.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/gettimeofday.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/mmap.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/getpriority.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/nproc.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/write.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/pty.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/mq.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/mprotect.rs from 2018 edition to 2021
[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 13.31s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]    Compiling nc v0.7.6 (/tmp/fixit)
[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 2.85s
[INFO] running `Command { std: "docker" "inspect" "8a531af5eb500c1957c0e6b4c749a979b114784aebc063e5b34519f8f0a87ae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a531af5eb500c1957c0e6b4c749a979b114784aebc063e5b34519f8f0a87ae2", kill_on_drop: false }`
[INFO] [stdout] 8a531af5eb500c1957c0e6b4c749a979b114784aebc063e5b34519f8f0a87ae2