I was going to try out Rust, then I saw this on the download page
curl https://sh.rustup.rs -sSf | sh
Really? curl https://sh.rustup.rs -sSf | sh
Really?The script is less than 400 lines, and is pretty easy to audit. We wrote it in such a way to prevent some issues like "if the download gets cut off only part of the script gets run." It's served over HTTPS.
You can also probably get an install from whatever package manager you use, if you prefer that.
If you're auditing it, you've already downloaded it, so it's unclear to me why you'd re-download and pipe rather than just running it.
Encouraging people to run code from some random URL on the Internet is always bad.
It seems like an ever-changing work in progress at the moment, with idiosyncrasies such as this.