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This bug was originally marked as duplicate of bug 203563, 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 (Build 201210011125) VM: Java HotSpot(TM) 64-Bit Server VM, 23.3-b01, Java(TM) SE Runtime Environment, 1.7.0_07-b10 OS: Windows 7 User Comments: GUEST: resized a panel to the edge of a button to the right ,which also happens to be the same location of the edge of a jSpinner above the panel. Stacktrace: java.lang.NullPointerException at org.netbeans.modules.form.layoutdesign.LayoutInterval.isPlacedAtBorder(LayoutInterval.java:813) at org.netbeans.modules.form.layoutdesign.LayoutFeeder.snapEqualToParallelSnap(LayoutFeeder.java:1034) at org.netbeans.modules.form.layoutdesign.LayoutFeeder.checkResizing2(LayoutFeeder.java:1017) at org.netbeans.modules.form.layoutdesign.LayoutFeeder.add(LayoutFeeder.java:466) at org.netbeans.modules.form.layoutdesign.LayoutDesigner.addComponents(LayoutDesigner.java:850) at org.netbeans.modules.form.layoutdesign.LayoutDesigner.endMoving(LayoutDesigner.java:811)
Created attachment 131443 [details] stacktrace
Reported for 7.3.x or earlier, no new info since then -> closing as worksforme, please reopen in case you see it.