and finally it all works as intended

market.go

@@ -10,6 +10,7 @@ import (
 	"math/rand"
 	"net/http"
 	"time"
+	"slices"
 
 	"git.niplace.ru/XoxJlopeZi4BB/imageutils"
 	"git.niplace.ru/XoxJlopeZi4BB/paxpamir/token"
@@ -31,10 +32,10 @@ func shuffle[S ~[]E, E any](a S) {
 	}
 }
 
-func takeOne[S ~[]T, T any](s S) T {
-	v := s[0]
-	s = s[2:]
-	fmt.Println(s)
+func takeOne[S ~[]T, T any](s *S) T {
+	var new = slices.Clone(*s)
+	v := new[0]
+	*s = new[1:] 
 	return v
 }
 
@@ -113,9 +114,9 @@ func HandleCommand(update tg.Update, bot *tg.BotAPI) {
 		buf := new(bytes.Buffer)
 		var img = imageutils.Concat(
 			Must(GetImage(fmt.Sprintf(LinkFormat,
-				takeOne(ShuffledCardPool)))),
+				takeOne(&ShuffledCardPool)))),
 			Must(GetImage(fmt.Sprintf(LinkFormat,
-				takeOne(ShuffledCardPool)))),
+				takeOne(&ShuffledCardPool)))),
 			imageutils.Right,
 		)
 		err = png.Encode(buf, img)