GermanStemmer.cs has numerous string substring errors
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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
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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