while loading LabelAtomProperties, they may refer to other labels, which can cause cycles.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@34590 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/Hudson.java

@@ -1393,7 +1393,9 @@ public final class Hudson extends Node implements ItemGroup<TopLevelItem>, Stapl
                 return (LabelAtom)l;
 
             // non-existent
-            labels.putIfAbsent(name,new LabelAtom(name));
+            LabelAtom la = new LabelAtom(name);
+            if (labels.putIfAbsent(name, la)==null)
+                la.load();
         }
     }
 

core/src/main/java/hudson/model/labels/LabelAtom.java

@@ -66,7 +66,6 @@ public class LabelAtom extends Label implements Saveable {
 
     public LabelAtom(String name) {
         super(name);
-        load();
     }
 
     /**