>This is the Rust idiom for “I am intentionally ignoring this return value”.
That doesn't make the code any less awful, it just makes idiomatic Rust sound awful. Discarding a return value without even a comment to explain why shouldn't be allowed in any critical project, and the linter should be perfectly capable of ensuring that a comment accompanies the discard and complaining loudly when it doesn't.
This is missing that it’s a human issue though. If someone is determined to discard an error and not do anything about it, they’ll just put in a dummy comment to appease the linter any way.
Force people to handle errors and you end up with the exception fiasco in eg Java where everything ends up being a runtime exception to avoid it
As the top comment states, there is a lint rule, but you have to turn it on.