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I can confirm that compilation works again on nightly. Should work in 1.73 then :D

Closing because @Veykril verified that it works :) The whole class of such issues might just disappear when we use `Cargo.toml` instead of `rust-project.json` as described in https://github.com/rust-lang/rustlings/issues/1935

You would need to provide the fields of the struct to flatten, in this example: `#[builder(flatten({a: String}))]`. This could be automated with a macro that wraps both types, but it...

I was too focused on skipping non-relevant parents 😅 I just use the parallel `ignore` walker now. Ready for a review :)

The [learn page](https://www.rust-lang.org/learn) on the official Rust website links to https://doc.rust-lang.org/book/ which is also shorter. So we should use that :)

Done in https://github.com/rust-lang/rustlings/commit/69021e1497f62d52fd2b41d5e5b71ca46b76d7c0

Sorry, closing because I don't think that the change is worth, especially after the improvements in version 6.

Duplicate of https://github.com/rust-lang/rustlings/issues/293 though the solutions would only be provided after an exercise is done.

Closing because seems to be resolved by https://github.com/rust-lang/rustlings/pull/1550 (see https://github.com/rust-lang/rustlings/issues/1430#issuecomment-1593748563)

Version 6 [improved the exercise a lot](https://github.com/rust-lang/rustlings/commit/64c2de95ca95c1d23dcb416723b33ccdfca9c956). Most importantly, the grade in the test is already changed to `"A+"`. If you still have any suggestions for [the current version](https://github.com/rust-lang/rustlings/blob/main/exercises/quizzes/quiz3.rs), I...