append to empty byte slice
append to empty byte slice

xiuzhifu/ffjson,xiuzhifu/ffjson,cw2018/ffjson,jamesliu96/ffjson,jamesliu96/ffjson,xyliuke/ffjson,trigrass2/ffjson,sunminghong/ffjson,sunminghong/ffjson,pquerna/ffjson,xladykiller/ffjson,cmeon/ffjson,cmeon/ffjson,xladykiller/ffjson,pquerna/ffjson,cw2018/ffjson,trigrass2/ffjson,xyliuke/ffjson