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Created attachment 117671 [details] Attached project Product Version: NetBeans IDE Dev (Build 201203300938) Java: 1.6.0_31; Java HotSpot(TM) Client VM 20.6-b01 System: Linux version 3.0.0-17-generic-pae running on i386; UTF-8; en_US (nb) 1.Open attached project 2.Open failing.FailFrame.java in design view 3.Drag and drop failing.FailPanel.java from Poject window into editor (failing.FailFrame.java design view) Result: JVM crash - see attached logs Excepted result: Warning "failing.FailPanel.java is not compiled" should be displayed
Created attachment 117672 [details] Log1
Created attachment 117673 [details] log2
The attached logs show that the virtual machine crashed because of segmentation fault. I can't imagine how this could be caused by GUI Builder/NetBeans. It seems to be a bug in the virtual machine. Feel free to file a bug against JVM.