[INFO] cloning repository https://github.com/pfreixes/tcp-connect
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pfreixes/tcp-connect" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpfreixes%2Ftcp-connect", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpfreixes%2Ftcp-connect'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 219e2acbc7bfd132633ec390c946ff94fcd65b51
[INFO] checking pfreixes/tcp-connect against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpfreixes%2Ftcp-connect" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pfreixes/tcp-connect on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pfreixes/tcp-connect
[INFO] finished tweaking git repo https://github.com/pfreixes/tcp-connect
[INFO] tweaked toml for git repo https://github.com/pfreixes/tcp-connect written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/pfreixes/tcp-connect 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-macros v2.3.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.85
[INFO] [stderr]   Downloaded windows-targets v0.52.5
[INFO] [stderr]   Downloaded socket2 v0.5.7
[INFO] [stderr]   Downloaded addr2line v0.22.0
[INFO] [stderr]   Downloaded rustc-demangle v0.1.24
[INFO] [stderr]   Downloaded miniz_oxide v0.7.3
[INFO] [stderr]   Downloaded cc v1.0.98
[INFO] [stderr]   Downloaded mio v0.8.11
[INFO] [stderr]   Downloaded backtrace v0.3.72
[INFO] [stderr]   Downloaded syn v2.0.66
[INFO] [stderr]   Downloaded gimli v0.29.0
[INFO] [stderr]   Downloaded windows_x86_64_gnullvm v0.52.5
[INFO] [stderr]   Downloaded object v0.35.0
[INFO] [stderr]   Downloaded windows_aarch64_gnullvm v0.52.5
[INFO] [stderr]   Downloaded windows_i686_gnullvm v0.52.5
[INFO] [stderr]   Downloaded tokio v1.38.0
[INFO] [stderr]   Downloaded windows_aarch64_msvc v0.52.5
[INFO] [stderr]   Downloaded windows_x86_64_msvc v0.52.5
[INFO] [stderr]   Downloaded windows_x86_64_gnu v0.52.5
[INFO] [stderr]   Downloaded windows_i686_gnu v0.52.5
[INFO] [stderr]   Downloaded windows_i686_msvc v0.52.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a7cbb579ee818e19f5aa81945604cf39b1881fb46e8d60b54b571b8cd90f221
[INFO] running `Command { std: "docker" "start" "-a" "0a7cbb579ee818e19f5aa81945604cf39b1881fb46e8d60b54b571b8cd90f221", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a7cbb579ee818e19f5aa81945604cf39b1881fb46e8d60b54b571b8cd90f221", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a7cbb579ee818e19f5aa81945604cf39b1881fb46e8d60b54b571b8cd90f221", kill_on_drop: false }`
[INFO] [stdout] 0a7cbb579ee818e19f5aa81945604cf39b1881fb46e8d60b54b571b8cd90f221
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e07648ae7437688349107013f4256f9b178059df1d1899b9fe4528832f7b50b7
[INFO] running `Command { std: "docker" "start" "-a" "e07648ae7437688349107013f4256f9b178059df1d1899b9fe4528832f7b50b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling proc-macro2 v1.0.85
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.66
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking socket2 v0.5.7
[INFO] [stderr]     Checking mio v0.8.11
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling tokio-macros v2.3.0
[INFO] [stderr]     Checking tokio v1.38.0
[INFO] [stderr]     Checking tcp-connect v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ErrorKind`
[INFO] [stdout]  --> src/dns_cache.rs:5:22
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{Error, ErrorKind};
[INFO] [stdout]   |                      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::prelude::*`
[INFO] [stdout]  --> src/inner.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/inner.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::net::SocketAddr`
[INFO] [stdout]  --> src/inner.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::net::SocketAddr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ToSocketAddrs`
[INFO] [stdout]  --> src/inner.rs:6:29
[INFO] [stdout]   |
[INFO] [stdout] 6 | use tokio::net::{TcpStream, ToSocketAddrs};
[INFO] [stdout]   |                             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ErrorKind`
[INFO] [stdout]  --> src/dns_cache.rs:5:22
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{Error, ErrorKind};
[INFO] [stdout]   |                      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]    --> src/dns_cache.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |     use std::fmt;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::prelude::*`
[INFO] [stdout]  --> src/inner.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/inner.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::net::SocketAddr`
[INFO] [stdout]  --> src/inner.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::net::SocketAddr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ToSocketAddrs`
[INFO] [stdout]  --> src/inner.rs:6:29
[INFO] [stdout]   |
[INFO] [stdout] 6 | use tokio::net::{TcpStream, ToSocketAddrs};
[INFO] [stdout]   |                             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]   --> src/lib.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | use std::hash::Hash;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ToSocketAddrs`
[INFO] [stdout]   --> src/lib.rs:41:29
[INFO] [stdout]    |
[INFO] [stdout] 41 | use tokio::net::{TcpStream, ToSocketAddrs};
[INFO] [stdout]    |                             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ToSocketAddrs`
[INFO] [stdout]   --> src/lib.rs:41:29
[INFO] [stdout]    |
[INFO] [stdout] 41 | use tokio::net::{TcpStream, ToSocketAddrs};
[INFO] [stdout]    |                             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]   --> src/lib.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | use std::hash::Hash;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/dns_cache.rs:208:13
[INFO] [stdout]     |
[INFO] [stdout] 208 |         let mut condvar_guard = condvar_mutex.lock().unwrap();
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/dns_cache.rs:208:13
[INFO] [stdout]     |
[INFO] [stdout] 208 |         let mut condvar_guard = condvar_mutex.lock().unwrap();
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/dns_cache.rs:559:17
[INFO] [stdout]     |
[INFO] [stdout] 559 |             for n in 0..10 {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::prelude::*`
[INFO] [stdout]  --> tests/test.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::spawn`
[INFO] [stdout]  --> tests/test.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::thread::spawn;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::time::Duration`
[INFO] [stdout]  --> tests/test.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tokio::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> tests/test.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     for n in 1..10 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> tests/test.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | /         tokio::spawn(async move {
[INFO] [stdout] 14 | |             tcp_connect
[INFO] [stdout] 15 | |                 .connect::<String>(&"google.com:80".to_string())
[INFO] [stdout] 16 | |                 .await;
[INFO] [stdout] 17 | |         })
[INFO] [stdout] 18 | |         .await;
[INFO] [stdout]    | |______________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let _ = tokio::spawn(async move {
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> tests/test.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 | /             tcp_connect
[INFO] [stdout] 15 | |                 .connect::<String>(&"google.com:80".to_string())
[INFO] [stdout] 16 | |                 .await;
[INFO] [stdout]    | |______________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 14 |             let _ = tcp_connect
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.60s
[INFO] running `Command { std: "docker" "inspect" "e07648ae7437688349107013f4256f9b178059df1d1899b9fe4528832f7b50b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e07648ae7437688349107013f4256f9b178059df1d1899b9fe4528832f7b50b7", kill_on_drop: false }`
[INFO] [stdout] e07648ae7437688349107013f4256f9b178059df1d1899b9fe4528832f7b50b7