lucene-gosen くよ bug

gistfile1.java

import java.io.Reader;
import java.io.StringReader;

import org.apache.lucene.analysis.ja.JapaneseTokenizer;

public class LuceneGosenKuyoBug {
        public static void main(String[] args) {
                String s = "";
                int count = Integer.parseInt(args[1]);
                for (int i = 0; i < count; ++i) {
                        s += args[0];
                }
                System.out.println(s);
                StringReader reader = new StringReader(s);
                JapaneseTokenizer tokenizer = new JapaneseTokenizer(reader);
                try {
                        while (tokenizer.incrementToken()) {
                        }
                } catch(Throwable t) {
                        t.printStackTrace();
                }
        }

}
/*
% java -version
java version "1.7.0_147-icedtea"
OpenJDK Runtime Environment (IcedTea7 2.0) (7~b147-2.0-1)
OpenJDK 64-Bit Server VM (build 21.0-b17, mixed mode)

%  javac -cp ...../lucene-core-3.5.0.jar:...../lucene-gosen-1.2.0-ipadic.jar:. LuceneGosenKuyoBug.java

% time java -cp ...../lucene-core-3.5.0.jar:...../lucene-gosen-1.2.0-ipadic.jar:. LuceneGosenKuyoBug くよ 10
くよくよくよくよくよくよくよくよくよくよ
java -cp  LuceneGosenKuyoBug くよ 10  0.45s user 0.05s system 118% cpu 0.427 total

% time java -cp ...../lucene-core-3.5.0.jar:...../lucene-gosen-1.2.0-ipadic.jar:. LuceneGosenKuyoBug くよ 15
くよくよくよくよくよくよくよくよくよくよくよくよくよくよくよ
java -cp  LuceneGosenKuyoBug くよ 15  0.82s user 0.10s system 134% cpu 0.686 total

% time java -cp ...../lucene-core-3.5.0.jar:...../lucene-gosen-1.2.0-ipadic.jar:. LuceneGosenKuyoBug くよ 20
くよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよ
java -cp  LuceneGosenKuyoBug くよ 20  25.99s user 1.53s system 180% cpu 15.211 total

% time java -cp ...../lucene-core-3.5.0.jar:...../lucene-gosen-1.2.0-ipadic.jar:. LuceneGosenKuyoBug くよ 30
くよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよくよ
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
    at java.util.IdentityHashMap.keySet(IdentityHashMap.java:963)
    at java.util.Collections$SetFromMap.<init>(Collections.java:3887)
    at java.util.Collections.newSetFromMap(Collections.java:3871)
    at java.lang.Throwable.printStackTrace(Throwable.java:648)
    at java.lang.Throwable.printStackTrace(Throwable.java:642)
    at java.lang.Throwable.printStackTrace(Throwable.java:633)
    at LuceneGosenKuyoBug.main(LuceneGosenKuyoBug.java:20)
java -cp  LuceneGosenKuyoBug くよ 30  78.00s user 2.22s system 132% cpu 1:00.62 total

*/