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This bug was originally marked as duplicate of bug 214044, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 8.1 (Build 201510222201) VM: Java HotSpot(TM) 64-Bit Server VM, 24.80-b11, Java(TM) SE Runtime Environment, 1.7.0_80-b15 OS: Windows 7 User Comments: goofdup: Reviewing properties in a panel from a GUI snapshot Stacktrace: java.lang.IllegalArgumentException: Unknown type 'java.awt.Dimension' at org.netbeans.modules.debugger.jpda.visual.JavaComponentInfo$ComponentProperty.setValueLazy(JavaComponentInfo.java:711) at org.netbeans.modules.debugger.jpda.visual.JavaComponentInfo$ComponentProperty.access$1300(JavaComponentInfo.java:526) at org.netbeans.modules.debugger.jpda.visual.JavaComponentInfo$ComponentProperty$3$1.run(JavaComponentInfo.java:802) at org.netbeans.modules.debugger.jpda.visual.RemoteServices$1.breakpointReached(RemoteServices.java:378) at org.netbeans.api.debugger.jpda.JPDABreakpoint.fireJPDABreakpointChange(JPDABreakpoint.java:300) at org.netbeans.api.debugger.jpda.JPDADebugger.fireBreakpointEvent(JPDADebugger.java:491)
Created attachment 159786 [details] stacktrace
A rare random bug, hard to reproduce and find the cause... The value of type Dimension should not have been editable. The exception should not cause any harm.