There is no hurry. If it's going to be available soon (before May 1, say) then we can wait. If not, then try to get a standalone reproducer. Even if we could look at private code, it makes it hard to, e.g., write a test case that we can submit into the public repo.
In any case, I don't think I'm the one to look at this. I don't know much about the arm assembler.