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https://issues.apache.org/jira/browse/LUCENENET-54?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13185710#comment-13185710
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Prescott Nasser commented on LUCENENET-54:
------------------------------------------
I've written a simple reproduction of LUCENENET-54
(ArgumentOutOfRangeException in SnowballProgram). I'm not sure about the
correct workflow to reopen this issue (it was closed as invalid in 2007
due to missing information), so I'm throwing what I got into the
developer mailing list and hope that someone else knows the correct
approach. Problem originates in SnowballProgram.slice_to, where the
second argument to StringBuilder.ToString(start, length) where the last
parameter is passed an index instead of the length.
Reproduction:
using System.IO;
using Lucene.Net.Analysis.Snowball;
using Lucene.Net.Analysis.Tokenattributes;
using NUnit.Framework;
namespace ConsoleApplication {
[TestFixture]
public class LuceneRepo {
[Test(Description = "LUCENENET-54")]
public void Repro() {
var analyzer = new SnowballAnalyzer("Finnish");
var input = new StringReader("terve");
var tokenStream = analyzer.TokenStream("fieldName", input);
var termAttr =
(TermAttribute)tokenStream.AddAttribute(typeof (TermAttribute));
Assert.That(tokenStream.IncrementToken(), Is.True);
Assert.That(termAttr.Term(), Is.EqualTo("terv"));
}
}
}
Unexpected exception:
System.ArgumentOutOfRangeException: Index and length must refer to a
location within the string.
Parameter name: length
at System.Text.StringBuilder.ToString(Int32 startIndex, Int32 length)
at SF.Snowball.SnowballProgram.slice_to(StringBuilder s) in
C:\Dev\Third
Party\Lucene.NET\src\contrib\Snowball\SF\Snowball\SnowballProgram.cs:line 467
at SF.Snowball.Ext.FinnishStemmer.r_tidy() in C:\Dev\Third
Party\Lucene.NET\src\contrib\Snowball\SF\Snowball\Ext\FinnishStemmer.cs:line
974
at SF.Snowball.Ext.FinnishStemmer.Stem() in C:\Dev\Third
Party\Lucene.NET\src\contrib\Snowball\SF\Snowball\Ext\FinnishStemmer.cs:line
1137
Expected result:
The unit test should pass.
> ArgumentOurOfRangeException caused by SF.Snowball.Ext.DanishStemmer
> -------------------------------------------------------------------
>
> Key: LUCENENET-54
> URL: https://issues.apache.org/jira/browse/LUCENENET-54
> Project: Lucene.Net
> Issue Type: Bug
> Affects Versions: Lucene.Net 2.9.4, Lucene.Net 3.0.3, Lucene.Net 2.9.4g
> Environment: Windows XP SP2, lucene.net v2.0 004
> Reporter: Torsten Rendelmann
> Priority: Critical
> Fix For: Lucene.Net 3.0.3
>
>
> Exception Information
> System.SystemException: System.Reflection.TargetInvocationException:
> Exception has been thrown by the target of an invocation. --->
> System.ArgumentOutOfRangeException: Index and length must refer to a location
> within the string.
> Parameter name: length
> at System.String.Substring(Int32 startIndex, Int32 length)
> at System.Text.StringBuilder.ToString(Int32 startIndex, Int32 length)
> at SF.Snowball.SnowballProgram.slice_to(StringBuilder s)
> at SF.Snowball.Ext.DanishStemmer.r_undouble()
> at SF.Snowball.Ext.DanishStemmer.Stem()
> --- End of inner exception stack trace ---
> at System.Reflection.RuntimeMethodInfo.InternalInvoke(Object obj,
> BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo
> culture, Boolean isBinderDefault, Assembly caller, Boolean verifyAccess)
> at System.Reflection.RuntimeMethodInfo.InternalInvoke(Object obj,
> BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo
> culture, Boolean verifyAccess)
> at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags
> invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
> at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
> at System.Reflection.MethodInfo.Invoke(Object obj, Object[] parameters)
> at Lucene.Net.Analysis.Snowball.SnowballFilter.Next()
> at Lucene.Net.Analysis.Snowball.SnowballFilter.Next()
> at Lucene.Net.Index.DocumentWriter.InvertDocument(Document doc)
> at Lucene.Net.Index.DocumentWriter.AddDocument(String segment, Document
> doc)
> at Lucene.Net.Index.IndexWriter.AddDocument(Document doc, Analyzer
> analyzer)
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