As a part of a fix for CR 6535356 two source files were changed
src/share/classes/sun/awt/dnd/SunDropTargetContextPeer.java
src/solaris/classes/sun/awt/X11/XIconInfo.java

The reasons for this was to assign a copy of array refference passed in the method to class filed instead of assigning the passed refference.

In the particular case the parameter is an array so to make a copy was used Arrays.copyOf() method. Because of absence of null verification, there could be a situation when passed reference has null value. Arrays.copyOf() requare length of array as its second argument. If array is null, NullpointerException will be thrown.

This should be fixed.
NullPointer exception stack trace:

Exception in thread "AWT-Windows" java.lang.NullPointerException
        at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.<init>(SunDropTargetContextPeer.java:736)
        at sun.awt.dnd.SunDropTargetContextPeer.postDropTargetEvent(SunDropTargetContextPeer.java:545)
        at sun.awt.dnd.SunDropTargetContextPeer.handleExitMessage(SunDropTargetContextPeer.java:341)
        at sun.awt.windows.WToolkit.eventLoop(Native Method)
        at sun.awt.windows.WToolkit.run(WToolkit.java:285)
        at java.lang.Thread.run(Thread.java:637)