syntax_data: {"ast_node_type":"variable","tokens":[{"end":46,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let new_place = Place::from(temp);
context_before:                 .new_temp(rval_ty, self.local_decls[place.as_ref().local].source_info.span);
context_after:             self.patcher.add_assign(location, new_place, rvalue.clone());