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https://issues.apache.org/jira/browse/LUCENENET-102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12533006
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George Aroush commented on LUCENENET-102:
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Hi Stefan,
I compared the attached file, GermanStemmer.cs.diff, with the current SVN copy
of Lucene.Net 2.0. What you attached is completely different, here are some:
1) The copyright header is wrong,
2) The namespace you are using is "Lucene.Net.Analysis.DE", but the SVN one is
"SF.Snowball.Ext"
3) The function signature of Stem() is different,
4) You have IsStemmable(), but the SVN one doesn't
Can you confirm that you generated this diff from Lucene.Net 2.0?
Regards,
-- George
> GermanStemmer.cs has numerous string substring errors
> -----------------------------------------------------
>
> Key: LUCENENET-102
> URL: https://issues.apache.org/jira/browse/LUCENENET-102
> Project: Lucene.Net
> Issue Type: Bug
> Environment: Lucene.Net 2.0 using the GermanStemmer
> Reporter: Stefan Rusek
> Attachments: GermanStemmer.cs.diff
>
>
> When using the german stemmer that is included in the 2.0 release. The
> stemmer will throw ArgumentOutOfRangeException. We have fixed the issue
> in-house but wanted to get the fix incorporated into the actual Lucene.Net
> release so that future users don't have this problem. Below is an example
> stacktrace, and I will attach a diff as well.
> System.ArgumentOutOfRangeException: Index and length must refer to a location
> within the string.
> Parameter name: length
> at System.String.InternalSubStringWithChecks(Int32 startIndex, Int32
> length, Boolean fAlwaysCopy)
> at Lucene.Net.Analysis.DE.GermanStemmer.Strip(StringBuilder buffer) in
> c:\src-hosted\fogcreek\FogBugz\FogUtil.Search\FogUtil.Search\Lucene.Net\Analysis\DE\GermanStemmer.cs:line
> 88
> at Lucene.Net.Analysis.DE.GermanStemmer.Stem(String term) in
> c:\src-hosted\fogcreek\FogBugz\FogUtil.Search\FogUtil.Search\Lucene.Net\Analysis\DE\GermanStemmer.cs:line
> 54
> at Lucene.Net.Analysis.DE.GermanStemFilter.Next() in
> c:\src-hosted\fogcreek\FogBugz\FogUtil.Search\FogUtil.Search\Lucene.Net\Analysis\DE\GermanStemFilter.cs:line
> 67
> at Lucene.Net.Index.DocumentWriter.InvertDocument(Document doc) in
> c:\src-hosted\fogcreek\FogBugz\FogUtil.Search\FogUtil.Search\Lucene.Net\Index\DocumentWriter.cs:line
> 181
> at Lucene.Net.Index.DocumentWriter.AddDocument(String segment, Document
> doc) in
> c:\src-hosted\fogcreek\FogBugz\FogUtil.Search\FogUtil.Search\Lucene.Net\Index\DocumentWriter.cs:line
> 106
> at Lucene.Net.Index.IndexWriter.AddDocument(Document doc, Analyzer
> analyzer) in
> c:\src-hosted\fogcreek\FogBugz\FogUtil.Search\FogUtil.Search\Lucene.Net\Index\IndexWriter.cs:line
> 626
> at Lucene.Net.Index.IndexWriter.AddDocument(Document doc) in
> c:\src-hosted\fogcreek\FogBugz\FogUtil.Search\FogUtil.Search\Lucene.Net\Index\IndexWriter.cs:line
> 613
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