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https://issues.apache.org/jira/browse/LUCENE-8572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16695760#comment-16695760
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Octavian Mocanu commented on LUCENE-8572:
-----------------------------------------
Hi [~romseygeek],
Trying e.g. at
{code:java}
/org/apache/lucene/queryparser/flexible/standard/parser/EscapeQuerySyntaxImpl.java:83
{code}
in
{code:java}
private static final CharSequence escapeTerm(CharSequence term, Locale
locale){code}
with
{code:java}
term = "İpone " [304, 112, 111, 110, 101, 32]
locale = "us"
{code}
result -> *StringIndexOutOfBoundsException*
(it'll only work when having locale = "tr")
> StringIndexOutOfBoundsException in parser/EscapeQuerySyntaxImpl.java
> --------------------------------------------------------------------
>
> Key: LUCENE-8572
> URL: https://issues.apache.org/jira/browse/LUCENE-8572
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/queryparser
> Affects Versions: 6.3
> Reporter: Octavian Mocanu
> Priority: Major
>
> With "lucene-queryparser-6.3.0", specifically in
> "org/apache/lucene/queryparser/flexible/standard/parser/EscapeQuerySyntaxImpl.java"
>
> when escaping strings containing extended unicode chars, and with a locale
> distinct from that of the character set the string uses, the process fails,
> with a "java.lang.StringIndexOutOfBoundsException".
>
> The reason is that the comparison is done by previously converting all of the
> characters of the string to lower case chars, and by doing this, the original
> string size isn't anymore the same, but less, as of the transformed one, so
> that executing
>
> org/apache/lucene/queryparser/flexible/standard/parser/EscapeQuerySyntaxImpl.java:89
> fails with a java.lang.StringIndexOutOfBoundsException.
> I wonder whether the transformation to lower case is really needed when
> treating the escape chars, since by avoiding it, the error may be avoided.
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