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This bug was originally marked as duplicate of bug 203449, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 8.2 (Build 201609300101) VM: Java HotSpot(TM) Client VM, 25.25-b02, Java(TM) SE Runtime Environment, 1.8.0_25-b18 OS: Windows 7 User Comments: GUEST: <Please provide a description of the problem or the steps to reproduce> This version of netbeans often hangs on 8GB core i5 system. Stacktrace: java.lang.NullPointerException at org.netbeans.modules.form.layoutdesign.LayoutFeeder.mergeInclusionsInCommonSequence(LayoutFeeder.java:4691) at org.netbeans.modules.form.layoutdesign.LayoutFeeder.mergeSequentialInclusions(LayoutFeeder.java:4334) at org.netbeans.modules.form.layoutdesign.LayoutFeeder.add(LayoutFeeder.java:457) at org.netbeans.modules.form.layoutdesign.LayoutDesigner.addComponents(LayoutDesigner.java:892) at org.netbeans.modules.form.layoutdesign.LayoutDesigner.endMoving(LayoutDesigner.java:851) at org.netbeans.modules.form.HandleLayer$ResizeComponentDrag.end(HandleLayer.java:3210)
Created attachment 164204 [details] stacktrace