The full paragraph [1] is "Distributing a modified version of the Rust programming language or the Cargo package manager and calling it Rust or Cargo requires explicit, written permission from the Rust core team. We will usually allow these uses as long as the modifications are (1) relatively small and (2) very clearly communicated to end-users."
By only providing half of that quote in your bug report, I think you're missing important context. I think that would probably be easy enough to comply with. I also think that is fairly in line with trademark policies in general. If someone significantly modifies Debian, I believe the Debian Project would insist that they use a different name for their product despite the DFSG and despite that Debian is free and open source. For instance, here is an excerpt without context from Debian's policy: "You cannot use Debian trademarks in a company or organization name or as the name of a product or service." [1] https://foundation.rust-lang.org/policies/logo-policy-and-media-guide/ [2] https://www.debian.org/trademark Thank you, Jeremy Bicha