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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-6914) DecimalDigitFilter skips characters in some cases (supplemental?)
Date Wed, 02 Dec 2015 14:56:10 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-6914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15035905#comment-15035905
] 

Robert Muir commented on LUCENE-6914:
-------------------------------------

looks buggy indeed. Can we also add a simple test (𝟙x𝟡x𝟠x𝟜 -> 1x9x8x4) ?

> DecimalDigitFilter skips characters in some cases (supplemental?)
> -----------------------------------------------------------------
>
>                 Key: LUCENE-6914
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6914
>             Project: Lucene - Core
>          Issue Type: Bug
>    Affects Versions: 5.4
>            Reporter: Hoss Man
>         Attachments: LUCENE-6914.patch, LUCENE-6914.patch, LUCENE-6914.patch
>
>
> Found this while writing up the solr ref guide for DecimalDigitFilter. 
> With input like "𝟙𝟡𝟠𝟜" ("Double Struck" 1984) the filter produces "1𝟡8𝟜"
(1, double struck 9, 8, double struck 4)  add some non-decimal characters in between the digits
(ie: "𝟙x𝟡x𝟠x𝟜") and you get the expected output ("1x9x8x4").  This doesn't affect
all decimal characters though, as evident by the existing test cases.
> Perhaps this is an off by one bug in the "if the original was supplementary, shrink the
string" code path?



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