Paper/patch-remap/mache-spigotflower-stripped/net/minecraft/server/commands/ListPlayersCommand.java.patch

--- a/net/minecraft/server/commands/ListPlayersCommand.java
+++ b/net/minecraft/server/commands/ListPlayersCommand.java
@@ -34,10 +33,17 @@
         });
     }
 
-    private static int format(CommandSourceStack commandsourcestack, Function<ServerPlayer, Component> function) {
-        PlayerList playerlist = commandsourcestack.getServer().getPlayerList();
-        List<ServerPlayer> list = playerlist.getPlayers();
-        Component component = ComponentUtils.formatList(list, function);
+    private static int format(CommandSourceStack source, Function<ServerPlayer, Component> nameExtractor) {
+        PlayerList playerlist = source.getServer().getPlayerList();
+        // CraftBukkit start
+        List<ServerPlayer> players = playerlist.getPlayers();
+        if (source.getBukkitSender() instanceof org.bukkit.entity.Player) {
+            org.bukkit.entity.Player sender = (org.bukkit.entity.Player) source.getBukkitSender();
+            players = players.stream().filter((ep) -> sender.canSee(ep.getBukkitEntity())).collect(java.util.stream.Collectors.toList());
+        }
+        List<ServerPlayer> list = players;
+        // CraftBukkit end
+        Component ichatbasecomponent = ComponentUtils.formatList(list, nameExtractor);
 
         commandsourcestack.sendSuccess(() -> {
             return Component.translatable("commands.list.players", list.size(), playerlist.getMaxPlayers(), component);