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This bug was originally marked as duplicate of bug 213268, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 7.3 Beta 2 (Build 201211062253) VM: Java HotSpot(TM) 64-Bit Server VM, 23.3-b01, Java(TM) SE Runtime Environment, 1.7.0_07-b11 OS: Windows 8 User Comments: GUEST: Scrolling up in a Groovy source file, after making an edit to the code. GUEST: just roll data in Output window Stacktrace: java.lang.NullPointerException at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.mouseWheelMoved(BasicScrollPaneUI.java:866) at java.awt.AWTEventMulticaster.mouseWheelMoved(AWTEventMulticaster.java:532) at java.awt.AWTEventMulticaster.mouseWheelMoved(AWTEventMulticaster.java:531) at java.awt.Component.processMouseWheelEvent(Component.java:6593) at java.awt.Component.processEvent(Component.java:6277) at java.awt.Container.processEvent(Container.java:2229)
Created attachment 129570 [details] stacktrace
*** This bug has been marked as a duplicate of bug 213268 ***