Shai Erera created LUCENE-5237:
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Summary: StemmerUtil.deleteN may delete too many characters
Key: LUCENE-5237
URL: https://issues.apache.org/jira/browse/LUCENE-5237
Project: Lucene - Core
Issue Type: Bug
Components: modules/analysis
Reporter: Shai Erera
Assignee: Shai Erera
StemmerUtil.deleteN calls to delete(), but in some cases, it may delete too
many characters. E.g. if you execute this code:
{code}
char[] buf = "abcd".toCharArray();
int len = StemmerUtil.deleteN(buf, buf.length, buf.length, 3);
System.out.println(new String(buf, 0, len));
{code}
You get "a", even though no character should have been deleted (not according
to the javadocs nor common logic).
The problem is in delete(), which always returns {{len-1}}, even if no
character is actually deleted.
I'll post a patch that fixes it shortly.
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