Name: gm110360 Date: 03/04/2002


FULL PRODUCT VERSION :
java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-b92)
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode)

FULL OPERATING SYSTEM VERSION :
RedHat Linux 7.1, kernel Linux version 2.4.9-13
(###@###.###) (gcc version 2.9
6 20000731 (Red Hat Linux 7.1 2.96-98)) #1 Tue Oct 30
20:05:14 EST 2001

ADDITIONAL OPERATING SYSTEMS :
None


A DESCRIPTION OF THE PROBLEM :
In JDK 1.3 when reading ISO 8859-1 text as UTF-8 with the
InputStreamReader a CharConversionException would be
thrown to indicate the problem. In JDK 1.4 the text is silently
accepted, even if the byte sequences are not valid according
to UTF-8. This means that one ends up with junk input without
noticing what's wrong.

REGRESSION. Last worked in version 1.3.1

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile and run attached code sample.

EXPECTED VERSUS ACTUAL BEHAVIOR :
Expected to get a CharConversionException, am not getting
any exception at all with JDK 1.4.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Traceback produced by JDK 1.3:

[larsga@pc36 java]$ java UTF8Test
Exception in thread "main" sun.io.MalformedInputException
        at sun.io.ByteToCharUTF8.convert(ByteToCharUTF8.java:152)
        at java.io.InputStreamReader.convertInto(InputStreamReader.java:137)
        at java.io.InputStreamReader.fill(InputStreamReader.java:186)
        at java.io.InputStreamReader.read(InputStreamReader.java:249)
        at java.io.InputStreamReader.read(InputStreamReader.java:222)
        at UTF8Test.main(UTF8Test.java:10)


This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.io.*;

public class UTF8Test {

  public static void main(String[] args) throws IOException {
    byte[] input = "d\u00f8lt".getBytes("iso-8859-1");
    InputStream stream = new ByteArrayInputStream(input);
    Reader reader = new InputStreamReader(stream, "utf-8");
    reader.read();
  }
  
}

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

CUSTOMER WORKAROUND :
Write your own UTF-8 decoder...

Release Regression From : 1.3.1_02
The above release value was the last known release where this
bug was known to work. Since then there has been a regression.

(Review ID: 143681)
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