bug#18: Fine-grained revert-buffer

[Richard Stallman]

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  > > There is a reason why you can't get a copy of that list: if anything
  > > else pointed to a copy of it, no marker in that buffer could be
  > > garbage collected.

  > Isn't that true of all marker copying/manipulation at the Lisp level?

There is always the possibility if blocking some markers from GC
by saving pointers to them and not clearing those out.
However, getting a list of ALL the markers would make it trivially
easy to block ALL the buffer's markers from GC.
-- 
Dr Richard Stallman
President, Free Software Foundation (https://gnu.org, https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)