Issue #3007424 by acbramley, Spokje, mbovan, narendra.rajwar27, AaronBauman,...

Issue #3007424 by acbramley, Spokje, mbovan, narendra.rajwar27, AaronBauman, ravi.shankar, aleevas, geek-merlin, jibran, YurkinPark, daffie, larowlan, Berdir, alexpott, marcelovani, catch, Lendude, mstrelan, tar_inet, Honza Pobořil, seanB, andrewbelcher, danflanagan8, susgo, sylus, sjpeters79, yogeshmpawar, raman.b: Multiple usages of FieldPluginBase::getEntity do not check for NULL, leading to WSOD