fixed edge case for get many slices

go/store/val/tuple.go

@@ -202,7 +202,7 @@ func sliceManyFields(tuple Tuple, indexes []int, slices [][]byte) [][]byte {
 	}
 
 	// we don't have a "start" offset for the first field
-	if indexes[0] == 0 {
+	if len(indexes) > 0 && indexes[0] == 0 {
 		o := readUint16(offs[:2])
 		slices[0] = data[:o]
 		indexes = indexes[1:]

go/store/val/tuple_test.go

@@ -49,7 +49,7 @@ func roundTripBytes(t *testing.T) {
 }
 
 func testTupleGetMany(t *testing.T) {
-	for n := 0; n < 100; n++ {
+	for n := 0; n < 1000; n++ {
 		fields := randomByteFields(t)
 		tup := NewTuple(testPool, fields...)