[PWGHF] Protect daughter index access in selectEvent to prevent segmentation faults

[alcaliva]

No description provided.

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[alcaliva]

Hi @ktf,

the build fails with the following message.
Do you perhaps have any clue of what is going wrong here?
Thanks for your help!

Alberto

========================================================================================

Git command for package 'Eigen3' failed.
Command: git clone --bare https://gitlab.com/libeigen/eigen.git /build/nomad/alloc/d26ec214-7bf3-2c16-0abe-db1b12c2dd0b/ci/local/o2dpg-sim-tests/sw/MIRROR/eigen3 --filter=tree:0
In directory: .
Exit code: 128
Git command for package 'Openloops' failed.
Command: git clone --bare https://gitlab.com/openloops/OpenLoops.git /build/nomad/alloc/d26ec214-7bf3-2c16-0abe-db1b12c2dd0b/ci/local/o2dpg-sim-tests/sw/MIRROR/openloops --filter=tree:0
In directory: .
Exit code: 128
Git command for package 'SHERPA' failed.
Command: git clone --bare https://gitlab.com/sherpa-team/sherpa.git /build/nomad/alloc/d26ec214-7bf3-2c16-0abe-db1b12c2dd0b/ci/local/o2dpg-sim-tests/sw/MIRROR/sherpa --filter=tree:0
In directory: .
Exit code: 128
Git command for package 'YODA' failed.
Command: git clone --bare https://gitlab.com/hepcedar/yoda.git /build/nomad/alloc/d26ec214-7bf3-2c16-0abe-db1b12c2dd0b/ci/local/o2dpg-sim-tests/sw/MIRROR/yoda --filter=tree:0
In directory: .
Exit code: 128
Git command for package 'Rivet' failed.
Command: git clone --bare https://gitlab.com/hepcedar/rivet.git /build/nomad/alloc/d26ec214-7bf3-2c16-0abe-db1b12c2dd0b/ci/local/o2dpg-sim-tests/sw/MIRROR/rivet --filter=tree:0
In directory: .
Exit code: 128

[stefanopolitano]

Hi @alcaliva ! Thanks for the update! I don't have any major comment. Just for my understanding though, does it really happens to have unsorted daughter indices? If I am not mistaken, the first and last daughter indices correspond to the first and last daughter index in the decay tree

[alcaliva]

Hi @stefanopolitano,
honestly, I don't know. I've seen this kind of protection in other codes so I decided to include it also here.
If it doesn't happen, it should be harmless.