ExprSets - fix return issue (#7327)

* ExprSets - fix return issue

* 7327 - add regression test

* ExprSets - get rid of ArrayList, eww

---------

Co-authored-by: Efnilite <35348263+Efnilite@users.noreply.github.com>

src/main/java/ch/njol/skript/expressions/ExprSets.java

@@ -1,6 +1,8 @@
 package ch.njol.skript.expressions;
 
+import java.lang.reflect.Array;
 import java.util.Iterator;
+import java.util.List;
 import java.util.function.Supplier;
 
 import org.bukkit.event.Event;
@@ -61,8 +63,8 @@ public boolean init(Expression<?>[] exprs, int matchedPattern, Kleenean isDelaye
 
 	@Override
 	protected Object[] get(Event event) {
-		Iterator<?> iterator = supplier.get();
-		return Lists.newArrayList(iterator).toArray(new Object[0]);
+		List<?> objects = Lists.newArrayList(supplier.get());
+		return objects.toArray((Object[]) Array.newInstance(classInfo.getC(), objects.size()));
 	}
 
 	@Override

src/test/skript/tests/regressions/7327-expr-sets-return.sk

@@ -0,0 +1,10 @@
+test "ExprSets class return failure":
+
+	set {_i} to diamond sword with item flag all item flags
+	assert {_i} is set with "Item with all item flags should be set"
+
+	set {_i::*} to 1 of all itemtypes
+	assert {_i::*} is set with "X of set of all itemtypes should be set"
+
+	# You're a lone wolf, Just want to make sure you don't error
+	set custom model data of all itemtypes to 10