FULL PRODUCT VERSION :
java version "1.4.2_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_06-b03)
Java HotSpot(TM) Client VM (build 1.4.2_06-b03, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
When trying to sign a jar file, which contains a file having german umlauts in its filename, the jarsigner crashes.

The error message is:
jarsigner error: java.lang.NullPointerException

Java 5 does not fix this problem.


ERROR MESSAGES/STACK TRACES THAT OCCUR :
jarsigner error: java.lang.NullPointerException

REPRODUCIBILITY :
This bug can be reproduced always.
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