syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:     if body.tainted_by_errors.is_some() {
context_before:     // If the typeck results are tainted, no need to make a by-ref body.
context_after:         return coroutine_def_id.to_def_id();