syntax_data: {"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // Do not iterate on return place and args, as they are trivially always live.
context_before:         assert_eq!(body.local_decls.len(), self.always_live_locals.domain_size());
context_after:         for local in body.vars_and_temps_iter() {