[aur-general] pacman 4.1 (makepkg 4.1) git pkgver autobump problem

The problem: according to archwiki, to autobump pkgver, pkgver should be empty and pkgver() is provided. However, if we package it, the version number is empty, so AUR wont accept it. The Question: 1. is it a bug? 2. should aur be updated to allow empty pkgver? My idea: if pkgver=AUTO, then pkgver() must be provided and it will be called. otherwise, pkgver must be valid version number.