Re: save-excursion and the mark

[Richard Stallman]

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  > > That's true, if it is _never_ used that way.  But it is hard to verify
  > > _never_, and we can expect some things to break.

  > Definitely.  This said, the same holds for changing the function
  > slot of symbols so that they can't be unbound anymore (and use Qnil
  > instead of Qunbound).  Yet when I did that in 24.4 noone noticed.

save-excursion is used an awful lot.
symbol-function is used very rarely.
An incompatible change in save-excursion is much more likely
to break things than an incompatible change in symbol-function.

-- 
Dr Richard Stallman
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