Need better error when trying to install with low disk space

[ChrisGreenaway]

Problem

I tried to install Rust when disk space was low and got the following error:

error: component download failed for cargo-x86_64-unknown-linux-gnu: could not download file from 'https://static.rust-lang.org/dist/2022-01-20/cargo-1.58.1-x86_64-unknown-linux-gnu.tar.xz' to '/root/.rustup/downloads/1d3f01b973ea3de5174d0a48b50828cf913bafc223ecbf768a0293602cff0cdc.partial'

which led me look for networking problems.

I would expect the error to indicate that the download could not be done due to limited disk space.

Steps

1. Use an x86-64 Linux
2. Fill up your disk
3. Run the Rust installer with default options

Possible Solution(s)

No response

Notes

No response

Rustup version

Rustup was not installed when the error happened, but now that I made some disk space and re-ran the installer, the version is reported as:

rustup 1.24.3 (ce5817a94 2021-05-31)
info: This is the version for the rustup toolchain manager, not the rustc compiler.
info: The currently active `rustc` version is `rustc 1.58.1 (db9d1b20b 2022-01-20)`

Installed toolchains

Default host: x86_64-unknown-linux-gnu
rustup home:  /home/user/.rustup

stable-x86_64-unknown-linux-gnu (default)
rustc 1.58.1 (db9d1b20b 2022-01-20)

[kinnison]

I agree we might be able to do better. If you, or anyone else, want to have a go at a patch, I'd be happy to help.