<p><a href="http://crates.io/">Crates.io</a> uses Sentry, an error monitoring service, to help the Rust team discover and fix the performance of the code. When there is an error, Sentry receives basic information about how you interacted with the website and the actions that led to the error. Additionally, your IP address may be disclosed to Sentry as part of the error reporting process but we’ve configured Sentry to delete it as soon as it’s received.