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Build: NetBeans IDE 6.5 (Build 200811100001) VM: Java HotSpot(TM) Client VM, 10.0-b19, Java(TM) SE Runtime Environment, 1.6.0_05-b13 OS: Windows XP, 5.1, x86 Stacktrace: java.lang.NullPointerException at javax.swing.OverlayLayout.preferredLayoutSize(OverlayLayout.java:121) at java.awt.Container.preferredSize(Container.java:1616) at java.awt.Container.getPreferredSize(Container.java:1601) at javax.swing.JComponent.getPreferredSize(JComponent.java:1634) at javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:769) at java.awt.Container.layout(Container.java:1432)
Created attachment 79425 [details] stacktrace
*** Issue 161943 has been marked as a duplicate of this issue. ***
2 reports from NB 6.5 and no further report from dev build till now. No idea if it could be some race condition or some problem in Swing. Without more info or steps to reproduce at least more often we cannot diagnose problem. I also did not find any such report in JDK bug database.