Thiere's NPE in AccessBridge while editing JList model:

java.lang.RuntimeException: java.lang.NullPointerException
at com.sun.java.accessibility.AccessBridge$InvocationUtils.invokeAndWait(AccessBridge.java:7206)
at com.sun.java.accessibility.AccessBridge$InvocationUtils.invokeAndWait(AccessBridge.java:7181)
at com.sun.java.accessibility.AccessBridge.getAccessibleActionFromContext(AccessBridge.java:1782)
at com.sun.java.accessibility.AccessBridge.runDLL(Native Method)
at com.sun.java.accessibility.AccessBridge.access$300(AccessBridge.java:57)
at com.sun.java.accessibility.AccessBridge$dllRunner.run(AccessBridge.java:141)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
at javax.swing.JList$AccessibleJList$AccessibleJListChild.getAccessibleAction(JList.java:3374)
at com.sun.java.accessibility.AccessBridge$70.call(AccessBridge.java:1785)
at com.sun.java.accessibility.AccessBridge$70.call(AccessBridge.java:1782)
at com.sun.java.accessibility.AccessBridge$InvocationUtils$CallableWrapper.run(AccessBridge.java:7262)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:301)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

The attached testcase can be used to reproduce the issue:

1. jabswitch.exe -enable
2. run JAWS
3. launch test case
4. select by arrow key last element in list
5. move focus by tap to "remove first" btn and press space
6. press shift+tap to return focus back to list
7.press key up, the exception should occure