PRW With Zero Lumi Run, master branch (2023.02.24.)
Protected pileup re-weighting against runs with zero luminosity. Since this is something that can apparently happen, as long as the run is short enough, and the data readout is 100% busy. (As is the case in run 430488 with the current latest GRL.)
This was discovered by @hsut, and discussed to some extend on PATHelp.