syntax_data: {"ast_node_type":"variable","tokens":[{"end":55,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let source_info = SourceInfo::outermost(body.span);
context_before: fn insert_poll_ready_block<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) -> BasicBlock {
context_after:     body.basic_blocks_mut().push(BasicBlockData::new_stmts(