Obvious/trivial. remove() fails if a list is empty. Andrew.
2010-04-27 Andrew Haley <a...@redhat.com> * java/util/concurrent/CopyOnWriteArrayList.java: Fix for empty list. Index: java/util/concurrent/CopyOnWriteArrayList.java =================================================================== --- java/util/concurrent/CopyOnWriteArrayList.java (revision 158610) +++ java/util/concurrent/CopyOnWriteArrayList.java (working copy) @@ -452,7 +452,12 @@ public synchronized boolean remove(Object element) { E[] snapshot = this.data; - E[] newData = (E[]) new Object[snapshot.length - 1]; + int len = snapshot.length; + + if (len == 0) + return false; + + E[] newData = (E[]) new Object[len - 1]; // search the element to remove while filling the backup array // this way we can run this method in O(n)