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From Marshall Schor <...@schor.com>
Subject Re: Erratic nullpointer exceptions because feature structure has no type in Ruta
Date Fri, 15 Nov 2019 15:50:50 GMT
good catch... I (obviously) didn't consider the error path...  -Marshall

On 11/12/2019 3:48 AM, Richard Eckart de Castilho wrote:
> On 11. Nov 2019, at 15:58, Marshall Schor <msa@schor.com> wrote:
>> This stack trace seems impossible, because the 3rd line shows
>>
>> CASImpl.ll_getFSRef calling a FeatureStructureImpl.toString method, which I
>> believe it doesn't do.
> Actually ....
>
>> org.apache.uima.cas.impl.CASImpl.ll_getFSRef(CASImpl.java:3653)
> in UIMA 2.10.2 the code at this line is:
>
> *uimaj-core/src/main/java/org/apache/uima/cas/impl/CASImpl.java:3644ff* [1]
> ```
>   @Override
> public final int ll_getFSRef(FeatureStructure fsImpl) {
>     if (null == fsImpl) {
>       return NULL;
>     }
>     final FeatureStructureImpl fsi = (FeatureStructureImpl) fsImpl;
>     if (this != fsi.getCASImpl()) {
>       if (this.getBaseCAS() != fsi.getCASImpl().getBaseCAS()) {  
>         // https://issues.apache.org/jira/browse/UIMA-3429
>         throw new CASRuntimeException(CASRuntimeException.DEREF_FS_OTHER_CAS, 
>             new Object[] {fsi.toString(), this.toString() } );
>       }
>     }
>     return fsi.getAddress();
>   }
> ```
>
> So there *IS* in fact a call to `FeatureStructureImpl.toString()` here!
>
> Cheers,
>
> -- Richard
>
> [1] https://github.com/apache/uima-uimaj/blob/uimaj-2.10.2/uimaj-core/src/main/java/org/apache/uima/cas/impl/CASImpl.java#L3643-L3657

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