% cargo check
Updating crates.io index
error: Unable to update registry crates-io
Caused by: failed to fetch https://github.com/rust-lang/crates.io-index
Caused by: process didn't exit successfully: git fetch --force --update-head-ok 'https://github.com/rust-lang/crates.io-index' '+HEAD:refs/remotes/origin/HEAD'
(exit status: 128) --- stderr fatal: unable to access 'GitHub - rust-lang/crates.io-index: Registry index for crates.io': Failed to connect to 127.0.0.1 port 15732 after 3 ms: Connection refused