{"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":".map_err_kind(|_|"}]}
                    .map_err_kind(|_| {
                self.check_ptr_access_signed(b, dist, CheckInAllocMsg::Dereferenceable)
                        // This could mean they point to different allocations, or they point to the same allocation