Re: [cdt-dev] How can I debug the index?

[Andrew Eidsness <eclipse@xxxxxxxxxx>]

This is something that we ran into as well.  The error depends on the code that is in your workspace, however, I was
never able to isolate the exact pattern that triggers the error.  The other way to trigger this bug (if your workspace
contains the problem code) is to do a <ctrl>-<shift>-t and search for "*".

Other code in the same file (javadoc right above the parameter definition) says that it can be null.  For now we've
assumed that the javadoc comment is the right one and have masked the error with a null check at the point of this
exception.

I haven't had a chance to go back and try to isolate the error.  It seems to be related to templates that are
instanstiated with both a type and an int -- T<int> and T<5>.

-Andrew

On 13-08-22 02:32 PM, Nathan Ridge wrote:
>> However, when I use the C/C++ Index view
> 
> I had no idea we had an index view.
> 
> I tried opening it for the project I'm currently working on. Expanding the
> "C++" node under my project caused Eclipse to use 100% CPU for about
> 5 minutes, after which I got "An internal error occurred during 'Child
> Node Computation': java.lang.NullPointerException".
> 
> Stack trace is:
> 
> java.lang.NullPointerException
>     at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalBinding.getBinding(EvalBinding.java:102)
>     at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalBinding.computeType(EvalBinding.java:249)
>     at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalBinding.getTypeOrFunctionSet(EvalBinding.java:243)
>     at org.eclipse.cdt.internal.core.dom.parser.cpp.CPPTemplateNonTypeArgument.getTypeOfNonTypeValue(CPPTemplateNonTypeArgument.java:79)
>     at org.eclipse.cdt.core.dom.ast.ASTTypeUtil.appendArgument(ASTTypeUtil.java:187)
>     at org.eclipse.cdt.core.dom.ast.ASTTypeUtil.appendArgumentList(ASTTypeUtil.java:165)
>     at org.eclipse.cdt.core.dom.ast.ASTTypeUtil.appendCppName(ASTTypeUtil.java:746)
>     at org.eclipse.cdt.core.dom.ast.ASTTypeUtil.appendTypeString(ASTTypeUtil.java:368)
>     at org.eclipse.cdt.core.dom.ast.ASTTypeUtil.appendType(ASTTypeUtil.java:596)
>     at org.eclipse.cdt.core.dom.ast.ASTTypeUtil.appendParameterTypeString(ASTTypeUtil.java:83)
>     at org.eclipse.cdt.core.dom.ast.ASTTypeUtil.getParameterTypeString(ASTTypeUtil.java:71)
>     at org.eclipse.cdt.internal.ui.indexview.IndexLabelProvider.getText(IndexLabelProvider.java:144)
>     at org.eclipse.cdt.internal.ui.indexview.IndexView$IndexContentProvider.wrap(IndexView.java:279)
>     at org.eclipse.cdt.internal.ui.indexview.IndexView$IndexContentProvider.computeChildren(IndexView.java:266)
>     at org.eclipse.cdt.internal.ui.indexview.IndexView$IndexContentProvider.asyncronouslyComputeChildren(IndexView.java:230)
>     at org.eclipse.cdt.internal.ui.viewsupport.AsyncTreeContentProvider.runJob(AsyncTreeContentProvider.java:229)
>     at org.eclipse.cdt.internal.ui.viewsupport.AsyncTreeContentProvider.access$0(AsyncTreeContentProvider.java:224)
>     at org.eclipse.cdt.internal.ui.viewsupport.AsyncTreeContentProvider$1.run(AsyncTreeContentProvider.java:63)
>     at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
> 
> Somewhat amusingly, the comment above that line says: "fParameterOwner is guaranteed to be not null" :)
> 
> Regards,
> Nate 		 	   		  
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