For ENG-4854, copy export data onto the heap to avoid issues with double free and use after free
For ENG-4854, copy export data onto the heap to avoid issues with double free and use after free

migue/voltdb,creative-quant/voltdb,kumarrus/voltdb,VoltDB/voltdb,wolffcm/voltdb,simonzhangsm/voltdb,kumarrus/voltdb,kumarrus/voltdb,simonzhangsm/voltdb,ingted/voltdb,paulmartel/voltdb,creative-quant/voltdb,VoltDB/voltdb,creative-quant/voltdb,creative-quant/voltdb,VoltDB/voltdb,ingted/voltdb,simonzhangsm/voltdb,wolffcm/voltdb,ingted/voltdb,flybird119/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,creative-quant/voltdb,flybird119/voltdb,ingted/voltdb,flybird119/voltdb,deerwalk/voltdb,wolffcm/voltdb,flybird119/voltdb,zuowang/voltdb,wolffcm/voltdb,zuowang/voltdb,paulmartel/voltdb,ingted/voltdb,simonzhangsm/voltdb,zuowang/voltdb,deerwalk/voltdb,zuowang/voltdb,zuowang/voltdb,zuowang/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,migue/voltdb,creative-quant/voltdb,deerwalk/voltdb,flybird119/voltdb,migue/voltdb,flybird119/voltdb,creative-quant/voltdb,wolffcm/voltdb,VoltDB/voltdb,deerwalk/voltdb,simonzhangsm/voltdb,paulmartel/voltdb,kumarrus/voltdb,paulmartel/voltdb,VoltDB/voltdb,migue/voltdb,VoltDB/voltdb,paulmartel/voltdb,VoltDB/voltdb,zuowang/voltdb,migue/voltdb,migue/voltdb,kumarrus/voltdb,deerwalk/voltdb,ingted/voltdb,migue/voltdb,ingted/voltdb,kumarrus/voltdb,wolffcm/voltdb,paulmartel/voltdb,wolffcm/voltdb,zuowang/voltdb,paulmartel/voltdb,kumarrus/voltdb,flybird119/voltdb,ingted/voltdb,paulmartel/voltdb,creative-quant/voltdb,migue/voltdb,deerwalk/voltdb,flybird119/voltdb,simonzhangsm/voltdb,kumarrus/voltdb,wolffcm/voltdb