>From: "Bruno Jouhier [MVP]" <bjouhier@club-internet.fr>
>Subject: Serious bug on ternary operator: ExecutionEngineException
>Date: Wed, 6 Oct 2004 22:20:37 +0200
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>
>The following program compiles fine bug generates an
>ExecutionEngineException at runtime:
>
>package TOBugJSharp;
>import System.Decimal;
>
>public class Buggy
>{
> /** @property */
> public Decimal get_DecimalValue() { return new Decimal(1); }
>
> public Object GetValue(boolean withCast)
> {
> return withCast ? (Object)get_DecimalValue() : get_DecimalValue();
> }
>
> /** @attribute System.STAThread() */
> public static void main(String[] args)
> {
> Buggy buggy = new Buggy();
> Object val = buggy.GetValue(true);
> // instanceof triggers ExecutionEngineException!
> if (val instanceof String)
> System.out.println("string");
> else
> System.out.println("other: " + val);
> }
>}
>
>Also, if you change it call buggy.GetValue(false) instead of
>buggy.GetValue(true), it prints
> other: null
>which is also wrong (if you try val.getClass() , you get an NPE!)
>
>So, it sounds that the compiler is generating buggy IL on the ternary
>operator inside GetValue, my guess is that the Decimal is not boxed
>correctly and then things go wild (but I am not an IL expert).
>
>I tried it with Whidbey and the bug is still there. So, I will post it on
>the whidbey site too.
>
>Bruno.
>
>
>