Check for valid pointers in GetJetConstituentsQuick (Port of PR#752 from 72X)

[heilman]

This was not ported forward from CMSSW_7_2_X. This change adds pointer checking to GetJetConstituentsQuick(). This prevents errors when looping over genJet constituents that have been dropped from miniAOD.

[cmsbuild]

A new Pull Request was created by @heilman for CMSSW_7_5_X.

Check for valid pointers in GetJetConstituentsQuick (Port of PR#752 from 72X)

It involves the following packages:

DataFormats/JetReco

@cmsbuild, @cvuosalo, @slava77 can you please review it and eventually sign? Thanks.
@rappoccio, @ahinzmann, @TaiSakuma, @jdolen, @nhanvtran, @schoef, @mariadalfonso this is something you requested to watch as well.
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[cvuosalo]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

+1
Tested at: 3eec796
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9637/5506/summary.html

[cvuosalo]

+1

For #9637 3eec796

Adding a check for a valid pointer to Jet::GetJetConstituentsQuick. No change in monitored quantities would be expected.

The code changes are satisfactory. Jenkins tests against baseline CMSSW_7_5_X_2015-06-15-2300 show no significant differences. Extended tests of workflow 140.53_RunHI2011 for the previous version of this PR (#9539) also showed no differences.

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_5_X IBs (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @smuzaffar

[davidlange6]

+1