[Issue 5212] Safer typesafe variadics

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=5212



--- Comment #1 from Sobirari Muhomori <dfj1esp02 at sneakemail.com> 2010-11-13 12:27:42 PST ---
> Just adding a dup inside the this() avoids the bug. Also, the bug is avoided if
> Foo receives arguments like this:
> 
> Foo foo() {
>     return new Foo([1, 2, 3]);
> }

Is it valid to pass them byref here?
It's a nice performance trick, but... shouldn't arguments be on the stack?

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