syntax_data: {"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // they are never assigned.
context_before:             // Don't bother with StorageLive and Dead for these temporaries,
context_after:             ExprKind::Break { .. } | ExprKind::Continue { .. } | ExprKind::Return { .. } => (),