Name: ddT132432 Date: 12/20/2001


FULL PRODUCT VERSION :
1.3.0, 1.3.1, 1.4b3, ...

java version "1.4.0-beta3"
Java(TM) 2 Runtime Environment, Standard Edition (build
1.4.0-beta3-b84)
Java HotSpot(TM) Client VM (build 1.4.0-beta3-b84, mixed
mode)

(but no problem with 1.2.2)


FULL OPERATING SYSTEM VERSION :
Windows NT Version 4.0 fr SP6a



A DESCRIPTION OF THE PROBLEM :
I'm reading a file with a BufferedReader, line by line with
readLine().
But before reading a line, I set a mark, read 30
characters, and reset the mark
(in my original program, I'm trying to detect a certain
value in these 30 characters).

In general it works perfectly.

BUT, I have one file that gives me an error.
If I add or remove any character, it works, but this
specific file does not work.

I can't attach it to this report, but send me an email and
I will reply qith this file in attachement...

REGRESSION. Last worked in version 1.2.2

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. java markTest.Main

(must have my magic file that breaks everything...)

EXPECTED VERSUS ACTUAL BEHAVIOR :
java.io.IOException: Mark invalid
        at
java.io.BufferedReader.resetBufferedReader.java:488)
        at markTest.Main.testMark(Main.java:22)
        at markTest.Main.main(Main.java:41)
last line read : 97 = at
weblogic.security.acl.Security.doAsPrivileged
(Security.java:483)
len : 30

ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.io.IOException: Mark invalid
        at
java.io.BufferedReader.resetBufferedReader.java:488)
        at markTest.Main.testMark(Main.java:22)
        at markTest.Main.main(Main.java:41)


This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package markTest;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.File;
import java.io.FileReader;

public class Main {
    private static void testMark(BufferedReader in)
    throws IOException
    {
        String line = null;
        char[] debut = new char[30];

        int num_ligne = 0;
        int len = 0;

        try {
            while (true) {
                in.mark(debut.length);
                len = in.read(debut, 0, debut.length);
                in.reset();
                if (len < 0) {
                    break;
                }
                num_ligne ++;
                line = in.readLine();
            }
        } catch (IOException e ) {
            e.printStackTrace();
            System.out.println("last line read : " +num_ligne + " = " + line);
            System.out.println("len : " + len);
        }
    }
    
    public static void main(String args[])
    throws IOException
    {
        File file = new File("doc", "testMark.txt");
        BufferedReader reader = new BufferedReader(new FileReader(file));
        testMark(reader);
    }
}
---------- END SOURCE ----------

Release Regression From : 1.2.2
The above release value was the last known release where this
bug was knwon to work. Since then there has been a regression.

(Review ID: 137565)
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