FULL PRODUCT VERSION :
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
Java HotSpot(TM) Server VM (build 1.5.0-b64, mixed mode)

(confirmed also in JDK 1.4.2_04 and 1.4.2_06)

ADDITIONAL OS VERSION INFORMATION :
Linux XX 2.4.24 #7 SMP XX i686 GNU/Linux

(confirmed also on Mac OSX)

A DESCRIPTION OF THE PROBLEM :
The ImageIO ImageReader throws an exception in the .read() method on some types of GIF images.

A sample file can be found at

ftp://ftp.berlios.de/pub/digilib/babylon_funny.gif

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Invoke ImageReader.read() on a special GIF image (e.g. with the provided test program)

A sample image file can be found at

ftp://ftp.berlios.de/pub/digilib/babylon_funny.gif



EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
the reader loads the image
ACTUAL -
the reader throws an exception

ERROR MESSAGES/STACK TRACES THAT OCCUR :
javax.imageio.IIOException: Unexpected block type 51!
        at com.sun.imageio.plugins.gif.GIFImageReader.readMetadata(GIFImageReader.java:721)
        at com.sun.imageio.plugins.gif.GIFImageReader.read(GIFImageReader.java:954)
        at javax.imageio.ImageReader.read(ImageReader.java:919)
        at ReadImgTest.main(ReadImgTest.java:43)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.io.*;
import java.util.*;
import java.awt.image.*;
import javax.imageio.*;
import javax.imageio.stream.*;

public class IIO {

public static void main(String[] args) {
File f = new File(args[0]);
ImageInputStream iis = null;
try {
iis = new FileImageInputStream(f);
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
Iterator i = ImageIO.getImageReaders(iis);
ImageReader r = (ImageReader) i.next();
r.setInput(iis);
try {
BufferedImage img = r.read(0);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}


---------- END SOURCE ----------