Regression test Test4200310.sh and class duplication in rt.jar and charsets.jar

[Pavel Tisnovsky]

Hi,

I noticed that the regression test Test42000310.sh regularly fails 
because it found duplicate classes stored in archives rt.jar and 
charsets.jar. I am not sure if this is a bug in OpenJDK6 or IcedTea, I 
suppose it's IcedTea issue. There are the list of duplicate classes 
(they are all from the same package, but this package contains more 
classes, over 400, only part of this package is "duplicated"):

sun/nio/cs/ext/DoubleByteDecoder.class 

sun/nio/cs/ext/DoubleByteEncoder.class 

sun/nio/cs/ext/EUC_CN.class 

sun/nio/cs/ext/EUC_CN$Decoder.class 

sun/nio/cs/ext/EUC_CN$Encoder.class 

sun/nio/cs/ext/EUC_KR.class 

sun/nio/cs/ext/EUC_KR$Decoder.class 

sun/nio/cs/ext/EUC_KR$Encoder.class 

sun/nio/cs/ext/EUC_TW.class 

sun/nio/cs/ext/EUC_TW$Decoder.class 

sun/nio/cs/ext/EUC_TW$Encoder.class 

sun/nio/cs/ext/ExtendedCharsets.class 

sun/nio/cs/ext/GBK.class 

sun/nio/cs/ext/GBK$Decoder.class 

sun/nio/cs/ext/GBK$Encoder.class 

sun/nio/cs/ext/HKSCS.class 

sun/nio/cs/ext/HKSCS$Decoder.class 

sun/nio/cs/ext/HKSCS$Encoder.class 

sun/nio/cs/ext/JIS_X_0201.class 

sun/nio/cs/ext/JIS_X_0201$Decoder.class 

sun/nio/cs/ext/JIS_X_0201$Encoder.class 

sun/nio/cs/ext/JIS_X_0208_Decoder.class 

sun/nio/cs/ext/JIS_X_0208_Encoder.class 

sun/nio/cs/ext/JIS_X_0212_Decoder.class 

sun/nio/cs/ext/JIS_X_0212_Encoder.class

btw: this regression test itself is buggy, I'm going to prepare webrev 
with proposed changes.

any ideas?

Cheers
Pavel