syntax_data: {"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"this.block_context.push(BlockFrame::TailExpr"}]}
source_snippet:             this.block_context.push(BlockFrame::TailExpr {
context_before:                 destination_ty.is_unit() || this.block_context.currently_ignores_tail_results();
context_after:                 info: BlockTailInfo { tail_result_is_ignored, span: expr.span },