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bug#62189: 29.0.60; complete-symbol while inside add-to-list form prints
From: |
Stefan Monnier |
Subject: |
bug#62189: 29.0.60; complete-symbol while inside add-to-list form prints a warning |
Date: |
Tue, 14 Mar 2023 16:28:08 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) |
>> 1. Start emacs -Q and switch to *scratch*
>> 2. Type (add-to-list f
>> 3. Hit C-M-i to run complete-symbol
>> 4. Observe the following warning and error in the *Messages* buffer:
>> Warning: Optimization failure for add-to-list: Handler:
>> add-to-list--anon-cmacro
>> (wrong-number-of-arguments (3 . 5) 2)
>
> That message is harmless,
Indeed, it's a mere warning about a failure to apply an optimization.
> so I don't think it's a bug.
But I do think it's a bug (I think we discussed this a few months ago,
probably in some other bug report): we should inhibit compiler macros
(and silence any other macro-expansion warnings)
during this kind of completion since it's normal to have
incomplete/invalid code at that point.
> Adding Stefan, who introduced the warning, in case he has comments.
The warning in valid and meaningful in other situations (e.g. if you
were to compile code that contains just `(add-to-list f)`), but here
it brings no value.
Stefan