bug#20640: 24.5; lexical-binding should work like a normal file-local variable

[Stefan Monnier]

>>> I think the only reason for this is an implementation detail
>>> (lexical-binding is parsed by other code than the other file-local
>>> variables).  It would be great to make it consistent with other
>>> variables so that the user doesn't need to care about the difference.
>> Allowing it at the end of the file, would require jumping to the end of
>> the file first, and then starting over from the beginning.
>> That'd be a very bad requirement.
> Why? We're going to have to read that page eventually anyway.

Because we can't read the first page correctly until we know whether it
should be read in lexical-binding mode or in dynamic-binding mode.


        Stefan