Mark match arms in try and for as being from desugarings. by Jarcho · Pull Request #149329 · rust-lang/rust (original) (raw)

Some of the arms created by these desugarings have an expression which isn't marked as coming from the desugaring. e.g. try generates Continue(val) => val where the expression has the span of the original parameter (done for diagnostic purposes). Since the arm created just used that span they end up without a desugaring mark unnecessarily.

This is only a minor annoyance with some work I'm doing in clippy.