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https://issues.apache.org/jira/browse/LUCENE-3831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-3831:
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Attachment: LUCENE-3831.patch
Thanks for the test cases Alan!
I folded those into a patch, added a few {{assert field != null}},
and then fixed SpanWeight to detect when its .getField() is
null and return a null scorer in that case.
I'd like to avoid the API break (changing Span*Query API to force
up-front providing of the field) if we can...
> Passing a null fieldname to MemoryFields#terms in MemoryIndex throws a NPE
> --------------------------------------------------------------------------
>
> Key: LUCENE-3831
> URL: https://issues.apache.org/jira/browse/LUCENE-3831
> Project: Lucene - Java
> Issue Type: Bug
> Components: core/index
> Affects Versions: 4.0
> Reporter: Alan Woodward
> Assignee: Michael McCandless
> Priority: Minor
> Attachments: LUCENE-3831.patch, TestNullFieldAfterRegexpRewrite.java,
> mindex-null-field.patch
>
>
> I found this when querying a MemoryIndex using a RegexpQuery wrapped by a
> SpanMultiTermQueryWrapper. If the regexp doesn't match anything in the
> index, it gets rewritten to an empty SpanOrQuery with a null field value,
> which then triggers the NPE.
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