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TIL in #rust pattern matches with guards don’t get the benefit of `unmatched_patterns` analysis. In hindsight it makes sense as it would need to be able to evaluate them, so imho in practice it’s better to avoid them for more complex patterns. Related, you don’t get exhaustivity check for guards either.

```
match i {
i if i > 1 => {}
// no `unmatched_patterns` warning
i if i > 1 => {}
_ => {}
}
```