Rustup: "rustfmt", "cargo-fmt" command failure
Using rustup, using the commands 'rustfmt' and 'cargo-fmt' results in an error (Unknown proxy name). This is fixed in a later commit (https://github.com/rust-lang/rustup/commit/8bec172129437ceec0300bdca489a107d1a97f0a#diff-2898cb515780ea48612238c024b7e3209115c3fdc58fc29e5c47fa54a6634d2e) which is also in aports master but not 3.14.2.