Error in TTreeCache::FillBuffer Inconsistency (when projecting and first file in a TChain has zero entries)

I see the following error when I project using “chain.Project()” and the first file in the chain has zero entries.
Error in TTreeCache::FillBuffer: Inconsistency: fCurrentClusterStart=0 fEntryCurrent=0 fNextClusterStart=80 but fCurrentEntry should not be in between the two

Is there something that I should be doing so as not to cause this error?

_ROOT Version: root 6.14.04
_Platform: x86_64-slc6-gcc62-opt
_Compiler: pyROOT

@pcanal can you let us know what could cause this?

Can you try with v6.14/06 or newer? (A related fix was done there and I can not reproduce you problem with any of the newer releases).

The error disappears if I use root 6.14.08 (6.14.08-x86_64-slc6-gcc62-opt).

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