tree a2ec528bc27d9cf9c409fed8014cc2bc131e07e6
parent d57338696118b907197bf1a551fd3e215af8dfd3
author Ben Vanik <benvanik@google.com> 1646367808 -0800
committer Ben Vanik <benvanik@google.com> 1646423541 -0800

Fail with an error if attempting to serialize an unknown attr.