[Rivet] Analysis D0_2001_S4674421

[Hendrik Hoeth]

Hi,

I can reproduce the segfault with my local Rivet installation (almost
head) and HepMC-2.05.00. Actually two different ones, with the same
hepmc file. One occurs in the first event, the other one after the last
event. I randomly see one or the other.

According to gdb the first case is a free() which is called by HepMC.
The other one is in LWH::Tree::commit, coming from
_wrap_AnalysisHandler_commitData.

Guess we'll have to look closer into this ...

Cheers,

    Hendrik

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