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Date: Mon, 13 Sep 2004 09:00:49 GMT
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To: freebsd-bugs@FreeBSD.org
From: Giorgos Keramidas <keramida@freebsd.org>
Subject: Re: bin/71628: [PATCH] cleanup of the usr.sbin/rpcbind code
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The following reply was made to PR bin/71628; it has been noted by GNATS.

From: Giorgos Keramidas <keramida@freebsd.org>
To: Dima Dorfman <dd@freebsd.org>
Cc: Dan Lukes <dan@obluda.cz>, bug-followup@freebsd.org
Subject: Re: bin/71628: [PATCH] cleanup of the usr.sbin/rpcbind code
Date: Mon, 13 Sep 2004 11:58:18 +0300

 On 2004-09-13 06:46, Dima Dorfman <dd@freebsd.org> wrote:
 > Dan Lukes <dan@obluda.cz> wrote:
 > > Dima Dorfman wrote:
 > > > Any initialization in the form "T v = v" invokes undefined behavior by
 > > > using the indeterminate value of an object. Eliminating a warning or
 > >
 > > 	Unless compiler documentation say other ...
 > > 	The v=v DURING DECLARATION (not later) is special case.
 >
 > I looked for such an exception in C99 before my original post, but I
 > didn't find one.
 
 There is a footnote in C99 that I'm a bit worried about.  In page 37, a
 footnote reads:
 
         41) Thus, an automatic variable can be initialized to a trap
         representation without causing undefined behavior, but the value of
         the variable cannot be used until a proper value is stored in it.
 
 Unless I'm mistaken, this means that the value of `foo' cannot be used in
 the right part of the following assignment:
 
         char *foo = foo;
 
 > Do I sound like a pedant yet? ;-)
 
 For a while, I was afraid my comments would sound unnecessarily pedantic
 too.  Fortunately, it seems I'm not.