On Sat, Dec 15, 2012 at 06:09:30AM -0500, Jeff King wrote:

> > Does
> > 
> >   #define error(fmt, ...) (error_impl(fmt, __VA_ARGS__), -1)
> > 
> > cause problems when not used in a return statement?
> Thanks, that was the cleverness I was missing.

Here it is as patches. One problem with this method is that if the
function implementation ever changes to _not_ return -1, then we get no
warning that our macro and the function implementation have diverged in

  [1/2]: make error()'s constant return value more visible
  [2/2]: silence some -Wuninitialized false positives

These would go on top of 1/3 from the original series to make -Wall -O3
clean (I'll repost the series as a whole when it is more obvious what we
want to do).

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