[Rivet] Rivet crash when applying projection

[Hendrik Hoeth]

Hi Frank,

Thus spake Frank Siegert (frank.siegert at durham.ac.uk):

> Then I have generated HepMC events with Sherpa as attached and tried
> to run them through rivet
> 
>   rivet -a D0_2008_S7554427 file.hepmc2g

I can reproduce the segfault with your HepMC events and your command on
the Wuppertal cluster, so we seem to talk about the same bug.

   Hendrik

-- 
"Two equal numbers are equivalent, even if they come from two
 different people one of which you don't like"
(MLM about the theoretical top cross-section, in a meeting
about theoretical uncertainties on the top mass)