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From: Lutz Donnerhacke <lutz@iks-jena.de>
Newsgroups: comp.lang.ada
Subject: Re: In case statment? (was Re: is exception when others => null;
 smart?)
Date: Wed, 30 Oct 2002 09:36:00 +0000 (UTC)
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* Peter Richtmyer wrote:
> As the following example illustrates, it really depends upon
> the compiler too. A "bad" value is handled differently as
> shown:
> -----------------------------------------------------------
> with system;
> with text_io;
> procedure test is
>     
>      a : character := character'val(2#11111111#);   
>      for a'size use 8;
>      b : boolean;
>      for b'address use a'address;
>      for b'size use 8;

Don't map variable b without pragma Import(Ada, b);
This prevents initialising of address space, which--in this case--renders
your example unusable.