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https://issues.apache.org/jira/browse/LUCENE-5869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14086449#comment-14086449
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ASF subversion and git services commented on LUCENE-5869:
---------------------------------------------------------
Commit 1615954 from [~rjernst] in branch 'dev/branches/branch_4x'
[ https://svn.apache.org/r1615954 ]
LUCENE-5869: Added restriction to positive values for maxExpansions in
FuzzyQuery
> FuzzyQuery should require positive maxExpansions
> ------------------------------------------------
>
> Key: LUCENE-5869
> URL: https://issues.apache.org/jira/browse/LUCENE-5869
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Ryan Ernst
> Fix For: 5.0, 4.10
>
> Attachments: LUCENE-5869.patch
>
>
> FuzzyQuery currently only disallows negative values of {{maxExpansions}}.
> However, passing {{0}} causes an NPE when the underlying {{TopTermsRewrite}}
> does a {{peek()}} on an empty queue, which returns {{null}}, and then goes on
> using it unknowingly.
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