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Fix the subr-arity returned by native compiled functions with lots of args

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This fixes bug #58739.  Make subr-arity return, e.g., (12 . 12) rather than
(12 . many) for a function with a fixed number of arguments more than 8.

* lisp/emacs-lisp/comp.el (comp-prepare-args-for-top-level): Only return a cdr
of 'many when there are &rest arguments.

* src/eval.c (eval_sub): Also check for a fixed number of args over 8 when
using the nargs + *args calling convention.
(funcall_subr): Also check numargs <= 8 before using the fixed args calling
convention.  Include the case numargs > 8 in the aMany calling convention.

* src/lisp.h (DEFUN): Amend the comment about MANY.
This commit is contained in:
Alan Mackenzie 2022-10-29 13:21:39 +00:00
parent 174dd06464
commit 31e7b9c073
3 changed files with 17 additions and 14 deletions
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9
src/lisp.h
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@ -3183,10 +3183,11 @@ CHECK_SUBR (Lisp_Object x)
`minargs' should be a number, the minimum number of arguments allowed.
`maxargs' should be a number, the maximum number of arguments allowed,
or else MANY or UNEVALLED.
MANY means pass a vector of evaluated arguments,
in the form of an integer number-of-arguments
followed by the address of a vector of Lisp_Objects
which contains the argument values.
MANY means there are &rest arguments. Here we pass a vector
of evaluated arguments in the form of an integer
number-of-arguments followed by the address of a vector of
Lisp_Objects which contains the argument values. (We also use
this convention when calling a subr with more than 8 parameters.)
UNEVALLED means pass the list of unevaluated arguments
`intspec' says how interactive arguments are to be fetched.
If the string starts with a `(', `intspec' is evaluated and the resulting