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bug#58739: Lack of error message about number of args (?native compilati
From: |
Alan Mackenzie |
Subject: |
bug#58739: Lack of error message about number of args (?native compilation?) |
Date: |
Sun, 23 Oct 2022 12:12:49 +0000 |
Hello, Emacs.
Firstly, note that the function desktop-buffer has exactly 12
parameters.
With an up to date Emacs 29:
(i) emacs -Q
(ii) M-x load-library RET desktop RET.
(iii) M-x disassemble RET desktop-buffer.
Note that this is native code.
(iv) M-: (desktop-buffer 1 2 3 4 5 6 7 8 9 10 11 12 13) RET
This gives an error message about 4 not being a list. What it ought to
do is instead throw an error about the number of arguments. This is a
bug.
(v) M-x load-file RET /path/to/emacs/lisp/desktop.elc.
(vi) M-x disassemble RET desktop-buffer.
Note that we now have byte compiled code.
(vii) M-: (desktop-buffer 1 2 3 4 5 6 7 8 9 10 11 12 13) RET
We now get a correct error message about the numbere of arguments.
As a matter of interest, I noticed this bug while byte-compiling
desktop.el inside Emacs. It gave a warning message about the number of
parameters to desktop-buffer having changed from 12+ to 12.
Here, I suspect there's a bug in the native compilation of
desktop-buffer.
--
Alan Mackenzie (Nuremberg, Germany).
- bug#58739: Lack of error message about number of args (?native compilation?),
Alan Mackenzie <=
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