syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // Overwrite temp local info if we have something more interesting to record.
context_before:                 let operand = unpack!(block = this.as_temp(block, scope, expr_id, Mutability::Mut));
context_after:                 if !matches!(local_info, LocalInfo::Boring) {