[jira] [Resolved] (LUCENE-3831) Passing a null fieldname to MemoryFields#terms in MemoryIndex throws a NPE

["Michael McCandless (Resolved) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-3831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless resolved LUCENE-3831.
----------------------------------------

       Resolution: Fixed
    Fix Version/s: 4.0
                   3.6

Thanks Alan.

I couldn't provoke an NPE on 3.x but I still fixed SpanWeight to not pass on a null field to IR.norms.
                
> 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
>             Fix For: 3.6, 4.0
>
>         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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