RDataFrame entry loss when using multi-thread in version 6.18.00

[Kevin1]

Thank you!

And I just want to briefly mention that I also posted a related warning issue based on the same input file for the future reference

Warning in <TChain::CopyAddresses>: Could not find branch named

Dear experts, Recently I was merging trees and saving only several branches like this: ROOT::RDataFrame df{"NOMINAL", "./merge/*.root"}; df.Snapshot("t", "./test.root", {"jet_pt"}); however I got lots of warnings like this: Warning in <TChain::CopyAddresses>: Could not find branch named 'jet_phi' in tree named 't' jet_phi is a branch in the original NOMINAL tree, just like jet_pt. In TTree source file I found something related: // FIXME: The GetBranch() function is braindead and may // no…