syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // For fully-polled coroutine, async drop has nothing to do.
context_before:     // RETURNED state also goes to default_block with `return Ready<()>`.
context_after:     let default_block = insert_poll_ready_block(tcx, &mut body);