FromResidual in 1.83 stable compiler error output

[steffahn]

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Stable compiler talks about unstable Step

When I throw this code #[derive(Debug, Copy, Clone, Eq, PartialEq, Hash, Ord, PartialOrd)] struct MyIndex(usize); #[cfg(test)] mod tests { use super::*; use rstest::rstest; fn name() { let (start, stop) = (6,10); let mapped: Vec<MyIndex> = (start .. stop).map(MyIndex).collect(); let direct: Vec<MyIndex> = (MyIndex(start)..MyIndex(stop)) .collect(); } } at the compiler (playground), it talks about Step = note: the following…