syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"this.block_context.push(BlockFrame::TailExpr"}]}
source_snippet:                     this.block_context.push(BlockFrame::TailExpr {
context_before:                     }
context_after:                         info: BlockTailInfo { tail_result_is_ignored: true, span: expr.span },