syntax_data: {"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"assert!(self.assigned_local.is_none(),"}]}
source_snippet:             assert!(self.assigned_local.is_none(), "`check_assigned_place` must not recurse");
context_before:         if let Some(assigned_local) = self.saved_local_for_direct_place(place) {