bug#16804: 24.3.50; [PATCH] fix with-silent-modifications

[Stefan Monnier]

>> I vaguely understand what kind of problem you're talking about, but not
>> precisely enough to guess what kinds of fixes might make sense.
> I think the problem is let-binding buffer-file-name and
> buffer-file-truename to nil is a really bad idea.  I did a grep on
> buffer-file-name in lisp/ directory and got about 2000 entries.  Code at
> distance may run while eval'ing the body of with-silent-modifications
> and affected by the nil value of buffer-file-name etc.

Yes, that's the general understanding I already had, but the particulars
are important as well.  Could you give details of the problem you
bump into?  Maybe a backtrace showing the sequence of calls that leads
to using buffer-file-name while it's rebound?


        Stefan