this post was submitted on 31 Aug 2023
106 points (94.2% liked)
Rust
6064 readers
38 users here now
Welcome to the Rust community! This is a place to discuss about the Rust programming language.
Wormhole
Credits
- The icon is a modified version of the official rust logo (changing the colors to a gradient and black background)
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
As someone who likes Rust and uses it every day, how have you never screamed at your PC as a direct result of the borrow checker or trait solver? Have you never encountered errors such as
higher-ranked lifetime error: failed to prove $FOO: Send
, which is sometimes actually just a bug in the compiler? Or the classicthe trait bound $FOO: $BAR is not satisfied
.axum
even has a#[debug_handler]
macro just to improve this error. I have spent literal days of my life fixing these kinds of errors, when the compiler not only doesn't provide a solution but fails to pinpoint the cause of the problem.I can only hope diagnostics continue to improve, because I know they matter to the Rust team.
I have seen some errors along those lines (but not exactly those) while working on the Free Monads proof of concept. Especially while trying to come up with a solution that doesn't require macros (which I didn't manage in Stable Rust, exactly due to such issues).
I have yet to see them in actual production code though, but maybe I was just lucky up to now?