DO NOT REPLY [Bug 32200] New: - CBZip2InputStream and CBZip2OutputStream produce strange exceptions when there's no data

[bugzilla]

DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG 
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=32200>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND 
INSERTED IN THE BUG DATABASE.

http://issues.apache.org/bugzilla/show_bug.cgi?id=32200

CBZip2InputStream and CBZip2OutputStream produce strange exceptions when 
there's no data

           Summary: CBZip2InputStream and CBZip2OutputStream produce strange
                    exceptions when there's no data
           Product: Ant
           Version: 1.6.2
          Platform: All
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Core
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]


If you create a CBZip2OutputStream and immediately close it you get an 
ArithmeticException.

If you create a CBZip2InputStream with no input you get a 
NullPointerException.  GZIPInputStream throws a EOFException which makes more 
sense.

Example:

import org.apache.tools.bzip2.*;
import java.io.*;

public class AntBug {
    public static void main(String[] args) {
        try {
            CBZip2InputStream cb =
                new CBZip2InputStream(new ByteArrayInputStream(new byte[0]));
            cb.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        try {
            CBZip2OutputStream cb =
                new CBZip2OutputStream(new ByteArrayOutputStream());
            cb.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Produces:

java.lang.NullPointerException
        at org.apache.tools.bzip2.CBZip2InputStream.bsR
(CBZip2InputStream.java:285)
        at org.apache.tools.bzip2.CBZip2InputStream.bsGetUChar
(CBZip2InputStream.java:303)
        at org.apache.tools.bzip2.CBZip2InputStream.initBlock
(CBZip2InputStream.java:192)
        at org.apache.tools.bzip2.CBZip2InputStream.<init>
(CBZip2InputStream.java:140)
        at AntBug.main(AntBug.java:7)
java.lang.ArithmeticException: / by zero
        at org.apache.tools.bzip2.CBZip2OutputStream.mainSort
(CBZip2OutputStream.java:1135)
        at org.apache.tools.bzip2.CBZip2OutputStream.doReversibleTransformation
(CBZip2OutputStream.java:1347)
        at org.apache.tools.bzip2.CBZip2OutputStream.endBlock
(CBZip2OutputStream.java:438)
        at org.apache.tools.bzip2.CBZip2OutputStream.close
(CBZip2OutputStream.java:389)
        at AntBug.main(AntBug.java:16)

---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]