Check out this java class:

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class Data { double doubleVal = Double.NaN; }
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Attempting to compile this java code with Kaffe's javac
(pizza) will
result in the following ArithmeticException on my brand new
Linux/Alpha DP264:
=======================================================

An exception has occurred in the compiler. (v0.39g)
Please file a bug report by sending your program and the
following diagnostic topizza.edu.au.

   Thank you.

java.lang.ArithmeticException
	at pizza.v39.DoubleConst.hashCode(consttypes.pizza:220)
	at pizza.v39.Pool.put(bytecode.pizza:209)
	at pizza.v39.Gen.putConstant(gen.pizza:510)
	at pizza.v39.ImmediateItem.ldc(items.pizza:381)
	at pizza.v39.ImmediateItem.load(items.pizza:427)
	at pizza.v39.ByteCodeGen.genExpr(bytecodegen.pizza:992)
	at pizza.v39.ByteCodeGen.genStat(bytecodegen.pizza:517)
	at pizza.v39.ByteCodeGen.genStats(bytecodegen.pizza:745)
	at pizza.v39.ByteCodeGen.genTry(bytecodegen.pizza:236)
	at pizza.v39.ByteCodeGen.genDef(bytecodegen.pizza:294)
	at pizza.v39.ByteCodeGen.genDef(bytecodegen.pizza:287)
	at pizza.v39.ByteCodeGen.generate(bytecodegen.pizza:270)
	at pizza.v39.Main.process(main.pizza:236)
	at pizza.v39.Main.compile(main.pizza:298)
	at pizza.v39.Main.main(main.pizza:372)
	at pizza.compiler.Main.main(Main.pizza:20)
=======================================================

I bet this is a problem with Kaffe and not pizza itself, but
perhaps you can help me debug this....
(P.S. I've sent a copy of this to pizza bug mailing list)