Re: lexical-binding is turned on in more use cases

[Richard Stallman]

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  > (defun my-make-counter ()
  >   (let ((counter 0))
  >     (lambda () (setq counter (1+ counter)))))

  > (setq mc (my-make-counter))

  > (funcall mc) => 1
  > (funcall mc) => 2 ; etc.

  > If you eval (my-make-counter) with lexical-binding off, the result is
  > not functional.

It is clear that my-make-counter needs to be run with lexical binding.
The closure it returns also needs to be run with lexical binding.

However, it seems like a bug that the lexical-dynamic mode in effect
around the _call_ to my-make-counter has any effect on how it runs.
It seems to me that if the definition of my-make-counter comes from a
file that specifies lexical, it should run with lexical bindings
regardless of where it is called from.

-- 
Dr Richard Stallman
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)