Please just clarify (at least): - Does this problem exist in upstream code?No.- If it does, what is the root cause, and how to reproduce?v18 had a problem because it has stub function. v19 doesn't have problem because it deleted the stub function.
What is the "stub function"?? If "v19 doesn't have problem", why do you even _need_ this patch??I am tired of guessing, but I don't care anymore given it's not a problem in upstream code.