syntax_data: {"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let ref_for_guard = self.local_decls.push(LocalDecl::<'tcx> {
context_before:         let locals = if has_guard.0 {
context_after:                 // This variable isn't mutated but has a name, so has to be