{"ast_node_type":"variable","tokens":[{"end":88,"kind":"keyword","start":0,"text":"let"}]}
                let val = self.const_val_to_op(val, tcx.types.bool, Some(dest.layout))?;
                let val = ConstValue::from_bool(tp_ty.needs_drop(tcx, self.typing_env));
                self.copy_op(&val, dest)?;