fix TestAllowsToSetRowsErrors

rows.go

@@ -33,7 +33,8 @@ type rowSets struct {
 }
 
 func (rs *rowSets) Err() error {
-	return rs.sets[rs.pos].closeErr
+	r := rs.sets[rs.pos]
+	return r.nextErr[r.pos-1]
 }
 
 func (rs *rowSets) CommandTag() pgconn.CommandTag {
@@ -76,7 +77,7 @@ func (rs *rowSets) Scan(dest ...interface{}) error {
 			//behave compatible with pgx
 			continue
 		}
-		destVal := reflect.ValueOf(dest[i]) 
+		destVal := reflect.ValueOf(dest[i])
 		if destVal.Kind() != reflect.Ptr {
 			return fmt.Errorf("Destination argument must be a pointer for column %s", r.defs[i].Name)
 		}

rows_test.go

@@ -211,8 +211,8 @@ func TestAllowsToSetRowsErrors(t *testing.T) {
 		t.Fatalf("unexpected error: %s", rs.Err())
 	}
 
-	if rs.Next() {
-		t.Fatal("was not expecting the second row, since there should be an error")
+	if !rs.Next() {
+		t.Fatal("expected the second row to be available, even there should be an error")
 	}
 	if rs.Err() == nil {
 		t.Fatal("expected an error, but got none")