syntax_data: {"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // when the iterator is an uninhabited type. unreachable_code will trigger instead.
context_before:             // Don't report arm reachability of desugared `match $iter.into_iter() { iter => .. }`
context_after:             hir::MatchSource::ForLoopDesugar if arms.len() == 1 => {}