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https://issues.apache.org/jira/browse/LUCENE-4656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13543017#comment-13543017
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Uwe Schindler commented on LUCENE-4656:
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The problem is here that the attributes are initialized after construction of
the Tokenizer before the consumer starts to consume the tokens. The bug in
IndexWriter is that it fails, when the initial getAttribute fails. Maybe it
should just initialize the bytesRef attribute to be NULL and fail later if
really tokens are emitted.
Lucene 3.x indexed empty terms.
> Fix EmptyTokenizer
> ------------------
>
> Key: LUCENE-4656
> URL: https://issues.apache.org/jira/browse/LUCENE-4656
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/analysis
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Trivial
> Attachments: LUCENE-4656.patch, LUCENE-4656.patch
>
>
> TestRandomChains can fail because EmptyTokenizer doesn't have a
> CharTermAttribute and doesn't compute the end offset (if the offset attribute
> was added by a filter).
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