Hi Sergey,

Right, a test case can be written without use of JAWS or other screen readers.
Please find a new webrev with the test there:
http://cr.openjdk.java.net/~mcherkas/8076249/9/webrev.01/

Thanks,
Mikhail.

On 4/12/2017 9:19 PM, Sergey Bylokhov wrote:
Hi, Mikhail.
Is it possible to write a test for this issue? I guess it is possible to force NPE even without AccessBridge.
Hello,

Could you please review the fix for jdk9?

AccessBridge works in separate thread,so if we modify JList model,
AccessBridge can request information about removed AccessibleJListChild or 
element
that changed position, so this can lead to NPE.
Almost all methods of AccessibleJListChild has checks for null, exception
those three where I added those checks.

Bug:https://bugs.openjdk.java.net/browse/JDK-8076249
Webrev:http://cr.openjdk.java.net/~mcherkas/8076249/9/webrev/

Thanks,
Mikhail.




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