detect conditions where loop cannot logically end
detect conditions where loop cannot logically end

Change-Id: I7e2ec1e09614510e6798ba8d5b9990c189a8dbb9

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core