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Bug 207669

Summary:	[71cat] NullPointerException at com.google.common.base.Preconditions.checkNotNull
Product:	guibuilder	Reporter:	aldobrucale <aldobrucale>
Component:	Code	Assignee:	issues@guibuilder <issues>
Status:	RESOLVED INVALID
Severity:	normal
Priority:	P3
Version:	7.1
Hardware:	All
OS:	All
Issue Type:	DEFECT	Exception Reporter:	184696
Attachments:	stacktrace

Description aldobrucale 2012-01-24 09:57:45 UTC

Build: NetBeans IDE 7.1 (Build 201112071828)
VM: Java HotSpot(TM) Client VM, 22.0-b10, Java(TM) SE Runtime Environment, 1.7.0_02-b13
OS: Linux

User Comments:
aldobrucale: Clicked on the  "Design" button for a swing component, there probably was an exception in my own code while I was modifying it.




Stacktrace: 
java.lang.NullPointerException
   at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:187)
   at com.google.common.cache.LocalCache.get(LocalCache.java:3966)
   at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3971)
   at com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4831)
   at com.google.common.cache.LocalCache$LocalManualCache.getUnchecked(LocalCache.java:4836)
   at com.imavis.omc.deviceui.view.api.CommercialInfo.getCommercialDescription(CommercialInfo.java:36)

Comment 1 aldobrucale 2012-01-24 09:57:48 UTC

Created attachment 115180 [details]
stacktrace

Comment 2 Stanislav Aubrecht 2012-01-24 10:03:30 UTC

not a bug in netbeans code

Comment 3 aldobrucale 2012-01-24 10:14:13 UTC

The exception is in the user code, but the ide was not painted correctly after this happened, and became unusable. IMO the nb code should be resistant to exceptions when it calls user code, catching them earlier in the stack trace.

Comment 4 Jan Stola 2012-04-17 15:25:56 UTC

GUI Builder cannot be resistant against all failures of user component. Not even in theory. For example, the attached exception comes from addNotify() method of the user component. Note that there don't have to be any GUI Builder's code on the stack when this method is called. Hence, the GUI Builder has no way to catch it.