illumos LX (void linux) rustup hangs

00-readme.md

Rust fails to install via rustup - the process hangs when trying to download files.

Quick Fix

The simple fix is:

RUSTUP_USE_CURL=1 ./rustup-init

This will tell rustup-init to use curl instead of reqwest.

Recreation

This bug can be recreated easily with the Cargo.toml and src/main.rs files in this gist - the program will just hang.

$ RUST_LOG=trace ./target/debug/debug-rustup
[2022-03-12T20:44:34Z TRACE reqwest::blocking::wait] (ThreadId(1)) park without timeout
[2022-03-12T20:44:34Z TRACE reqwest::blocking::client] (ThreadId(2)) start runtime::block_on
[2022-03-12T20:44:34Z TRACE reqwest::blocking::wait] wait at most 10s
[2022-03-12T20:44:34Z TRACE reqwest::blocking::wait] (ThreadId(1)) park timeout 9.999995666s
[2022-03-12T20:44:34Z DEBUG reqwest::connect] starting new connection: https://www.daveeddy.com/
[2022-03-12T20:44:44Z TRACE reqwest::blocking::wait] wait timeout exceeded
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: reqwest::Error { kind: Request, url: Url { scheme: "https", cannot_be_a_base: false, username: "", password: None, host: Some(Domain("www.daveeddy.com")), port: None, path: "/", query: None, fragment: None }, source: TimedOut }', src/main.rs:15:39
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
[2022-03-12T20:44:44Z TRACE reqwest::blocking::client] closing runtime thread (ThreadId(2))
[2022-03-12T20:44:44Z TRACE reqwest::blocking::client] signaled close for runtime thread (ThreadId(2))

Cargo.toml

[package]
name = "debug-rustup"
version = "0.1.0"
edition = "2021"

[dependencies]
env_logger = "0.9.0"
reqwest = { version = "0.11.9", features = ["blocking"] }

[features]

main.rs

use std::time::Duration;

fn main() {
    let url = "https://www.daveeddy.com";
    let timeout = Duration::from_secs(10);

    env_logger::init();

    let client = reqwest::blocking::Client::builder()
        .timeout(timeout)
        .connection_verbose(true)
        .build()
        .unwrap();

    let resp = client.get(url).send().unwrap();
    println!("resp = {:?}", resp);
}

This bug has been narrowed down tokio -> https://gist.github.com/bahamas10/a773315ebbbdba445a11bd62206b0480