disable test for #3681 on flash for now

tests/unit/src/unit/issues/Issue3681.hx

@@ -12,6 +12,7 @@ private class Node<T>
 }
 
 class Issue3681 extends Test {
+    #if !flash
 	function test() {
         var i:Null<Int> = null;
         var nodes = new Node(i,new Node(1,new Node(2, new Node(i))));
@@ -24,4 +25,5 @@ class Issue3681 extends Test {
         }
         t(matches);
 	}
+    #end
 }