see https://stackoverflow.com/questions/65912637/how-can-i-fix-this-error-struct-utf8-is-empty-support-for-empty-structs-is-d/65922099

I've seen this locally on macos as well.

/cc @dcharkes @kevmoo if you know anything

If this exists on the current release candidate we should find a cherrypick for it. /cc @christopherfujino - I'm not sure which hash(es) to check for that

Filing this as a P0 until we can determine whether this is happening on RC branch.