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Build: NetBeans IDE Dev (Build 200903081401) VM: Java HotSpot(TM) Client VM, 11.0-b15, Java(TM) SE Runtime Environment, 1.6.0_10-b33 OS: Windows XP, 5.1, x86 User Comments: dmikusa: Saving a file. GUEST: added folders via project explorers when saving file as Stacktrace: java.lang.NullPointerException at javax.swing.JComponent.repaint(JComponent.java:4746) at sun.swing.FilePane$2.repaintListSelection(FilePane.java:115) at sun.swing.FilePane$2.repaintSelection(FilePane.java:105) at sun.swing.FilePane$2.focusLost(FilePane.java:100) at java.awt.AWTEventMulticaster.focusLost(AWTEventMulticaster.java:213) at java.awt.Component.processFocusEvent(Component.java:6026)
Created attachment 78686 [details] stacktrace
Do you have reproducible test case? Or is it just random?
It is a JDK bug. http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6794829