review comment: add claryfing comment
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@ -147,6 +147,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
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}
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if !arm_ty.is_never() {
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// When a match arm has type `!`, then it doesn't influence the expected type for
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// the following arm. If all of the prior arms are `!`, then the influence comes
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// from elsewhere and we shouldn't point to any previous arm.
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prior_arm = Some((arm_block_id, arm_ty, arm_span));
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}
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}
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