Crash on NULL again in system table check.
Crash on NULL again in system table check.

snaga/postgres-xl,xinzweb/gpdb,ahachete/gpdb,rvs/gpdb,ashwinstar/gpdb,CraigHarris/gpdb,pavanvd/postgres-xl,greenplum-db/gpdb,tpostgres-projects/tPostgres,50wu/gpdb,jmcatamney/gpdb,atris/gpdb,kaknikhil/gpdb,lisakowen/gpdb,chrishajas/gpdb,greenplum-db/gpdb,cjcjameson/gpdb,cjcjameson/gpdb,foyzur/gpdb,jmcatamney/gpdb,techdragon/Postgres-XL,randomtask1155/gpdb,postmind-net/postgres-xl,ovr/postgres-xl,chrishajas/gpdb,lintzc/gpdb,lisakowen/gpdb,xuegang/gpdb,kmjungersen/PostgresXL,randomtask1155/gpdb,lintzc/gpdb,cjcjameson/gpdb,lpetrov-pivotal/gpdb,lisakowen/gpdb,lisakowen/gpdb,edespino/gpdb,Quikling/gpdb,chrishajas/gpdb,tpostgres-projects/tPostgres,zeroae/postgres-xl,yazun/postgres-xl,chrishajas/gpdb,yuanzhao/gpdb,lintzc/gpdb,Quikling/gpdb,ashwinstar/gpdb,CraigHarris/gpdb,techdragon/Postgres-XL,0x0FFF/gpdb,yuanzhao/gpdb,arcivanov/postgres-xl,oberstet/postgres-xl,tangp3/gpdb,yazun/postgres-xl,jmcatamney/gpdb,pavanvd/postgres-xl,kaknikhil/gpdb,lintzc/gpdb,xinzweb/gpdb,randomtask1155/gpdb,adam8157/gpdb,arcivanov/postgres-xl,greenplum-db/gpdb,0x0FFF/gpdb,CraigHarris/gpdb,snaga/postgres-xl,50wu/gpdb,Chibin/gpdb,tangp3/gpdb,pavanvd/postgres-xl,lisakowen/gpdb,Chibin/gpdb,rvs/gpdb,randomtask1155/gpdb,50wu/gpdb,kaknikhil/gpdb,ovr/postgres-xl,tangp3/gpdb,zeroae/postgres-xl,xuegang/gpdb,0x0FFF/gpdb,Chibin/gpdb,Chibin/gpdb,zaksoup/gpdb,xinzweb/gpdb,yuanzhao/gpdb,royc1/gpdb,foyzur/gpdb,Quikling/gpdb,rvs/gpdb,lisakowen/gpdb,lpetrov-pivotal/gpdb,edespino/gpdb,adam8157/gpdb,Chibin/gpdb,royc1/gpdb,Quikling/gpdb,Quikling/gpdb,Quikling/gpdb,lisakowen/gpdb,janebeckman/gpdb,lpetrov-pivotal/gpdb,pavanvd/postgres-xl,foyzur/gpdb,xuegang/gpdb,rubikloud/gpdb,ahachete/gpdb,adam8157/gpdb,xinzweb/gpdb,kaknikhil/gpdb,edespino/gpdb,kaknikhil/gpdb,postmind-net/postgres-xl,50wu/gpdb,CraigHarris/gpdb,royc1/gpdb,50wu/gpdb,randomtask1155/gpdb,techdragon/Postgres-XL,cjcjameson/gpdb,kaknikhil/gpdb,kmjungersen/PostgresXL,xinzweb/gpdb,lisakowen/gpdb,greenplum-db/gpdb,janebeckman/gpdb,xuegang/gpdb,0x0FFF/gpdb,lintzc/gpdb,greenplum-db/gpdb,janebeckman/gpdb,yuanzhao/gpdb,Quikling/gpdb,lpetrov-pivotal/gpdb,jmcatamney/gpdb,edespino/gpdb,0x0FFF/gpdb,arcivanov/postgres-xl,edespino/gpdb,postmind-net/postgres-xl,oberstet/postgres-xl,Postgres-XL/Postgres-XL,arcivanov/postgres-xl,ashwinstar/gpdb,rubikloud/gpdb,snaga/postgres-xl,janebeckman/gpdb,adam8157/gpdb,kmjungersen/PostgresXL,zeroae/postgres-xl,lpetrov-pivotal/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,zaksoup/gpdb,chrishajas/gpdb,atris/gpdb,ashwinstar/gpdb,xinzweb/gpdb,ahachete/gpdb,tangp3/gpdb,lintzc/gpdb,royc1/gpdb,zaksoup/gpdb,edespino/gpdb,Quikling/gpdb,0x0FFF/gpdb,50wu/gpdb,lintzc/gpdb,lintzc/gpdb,yuanzhao/gpdb,ashwinstar/gpdb,CraigHarris/gpdb,ovr/postgres-xl,jmcatamney/gpdb,lintzc/gpdb,rvs/gpdb,xinzweb/gpdb,ahachete/gpdb,edespino/gpdb,Quikling/gpdb,atris/gpdb,postmind-net/postgres-xl,snaga/postgres-xl,rvs/gpdb,atris/gpdb,randomtask1155/gpdb,Postgres-XL/Postgres-XL,jmcatamney/gpdb,janebeckman/gpdb,cjcjameson/gpdb,pavanvd/postgres-xl,janebeckman/gpdb,Chibin/gpdb,janebeckman/gpdb,janebeckman/gpdb,tangp3/gpdb,zaksoup/gpdb,oberstet/postgres-xl,rvs/gpdb,kmjungersen/PostgresXL,foyzur/gpdb,edespino/gpdb,arcivanov/postgres-xl,xuegang/gpdb,Postgres-XL/Postgres-XL,kmjungersen/PostgresXL,atris/gpdb,foyzur/gpdb,CraigHarris/gpdb,rvs/gpdb,lpetrov-pivotal/gpdb,rubikloud/gpdb,royc1/gpdb,atris/gpdb,xuegang/gpdb,arcivanov/postgres-xl,rubikloud/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,greenplum-db/gpdb,foyzur/gpdb,tpostgres-projects/tPostgres,greenplum-db/gpdb,yuanzhao/gpdb,ahachete/gpdb,zaksoup/gpdb,royc1/gpdb,xuegang/gpdb,foyzur/gpdb,yazun/postgres-xl,adam8157/gpdb,CraigHarris/gpdb,yuanzhao/gpdb,Quikling/gpdb,rubikloud/gpdb,Chibin/gpdb,Chibin/gpdb,greenplum-db/gpdb,ovr/postgres-xl,50wu/gpdb,randomtask1155/gpdb,techdragon/Postgres-XL,rvs/gpdb,ashwinstar/gpdb,techdragon/Postgres-XL,atris/gpdb,jmcatamney/gpdb,ahachete/gpdb,ashwinstar/gpdb,xuegang/gpdb,snaga/postgres-xl,kaknikhil/gpdb,royc1/gpdb,rvs/gpdb,cjcjameson/gpdb,cjcjameson/gpdb,rvs/gpdb,zeroae/postgres-xl,xuegang/gpdb,adam8157/gpdb,Postgres-XL/Postgres-XL,adam8157/gpdb,zeroae/postgres-xl,edespino/gpdb,kaknikhil/gpdb,Postgres-XL/Postgres-XL,0x0FFF/gpdb,tpostgres-projects/tPostgres,foyzur/gpdb,cjcjameson/gpdb,edespino/gpdb,chrishajas/gpdb,CraigHarris/gpdb,postmind-net/postgres-xl,Chibin/gpdb,ahachete/gpdb,janebeckman/gpdb,yuanzhao/gpdb,janebeckman/gpdb,rubikloud/gpdb,kaknikhil/gpdb,tangp3/gpdb,chrishajas/gpdb,royc1/gpdb,yuanzhao/gpdb,oberstet/postgres-xl,zaksoup/gpdb,zaksoup/gpdb,tpostgres-projects/tPostgres,lpetrov-pivotal/gpdb,xinzweb/gpdb,zaksoup/gpdb,atris/gpdb,oberstet/postgres-xl,chrishajas/gpdb,ahachete/gpdb,yazun/postgres-xl,randomtask1155/gpdb,kaknikhil/gpdb,rubikloud/gpdb,50wu/gpdb,adam8157/gpdb,yazun/postgres-xl,CraigHarris/gpdb,0x0FFF/gpdb,lpetrov-pivotal/gpdb,tangp3/gpdb,ovr/postgres-xl,rubikloud/gpdb,ashwinstar/gpdb,tangp3/gpdb,Chibin/gpdb