IL2CPP compilation fail [B18]

Tried to build our application on B18 and got new errors.

Message 1

Message 2

Message 3

This three messages are duplicated few times (but paths are a bit different). And then goes new one:
Message N

Message N + 1

Message N + 2

Message N + 3

It works great on [B17]. Any thoughts?

Please file a bug so we can have a look.