bug#36216: 27.0.50; Variable binding depth exceeds max-specpld-size during bootstrap

[Stefan Monnier <monnier@iro.umontreal.ca>]

Earlier, Juanma said:
> I wonder if it wouldn't just make sense to borrow the same trick
> loadup.el uses with pcase.el to disable eager macroexpansion, i.e.,
> something like

That pcase situation is different (not only because pcase is not
pre-loaded, contrary to cl-generic, but also because this trick is used
to break a circular dependency, rather than to minimize stack depth).

Eli said:
> Any objections to bumping max-specpld-size from 1300 to 1500?

We've been increasing the stack size bit by bit for a long time now
(and IIRC max-specpld-size is not allocated on the C stack, so we can
go crazy without any risk of crashing on a small C stack), so:
No objection from me.

I do wonder what caused the increase of stack depth, tho: I can't
remember offhand anything recent that would explain it in this part of
the code.


        Stefan