Re: comment-enter-backward: Wrong type argument: number-or-marker-p, nil

[Stephen Berman <Stephen.Berman@gmx.net>]

On Thu, 03 Apr 2008 18:27:01 -0400 Stefan Monnier <monnier@IRO.UMontreal.CA> wrote:

>> 1. emacs -Q
>> 2. C-x C-f test.c
>> 3. Type this with no following newline: // test
>> 4. C-SPC C-SPC C-a M-;
>> => The line gets uncomments but Emacs throws an error
>> "comment-enter-backward: Wrong type argument: number-or-marker-p, nil"
>
>> Note that if the line typed at step 3 is this: /* test */ (also with no
>> following newline), then after step 4 there is no error.
>
>> AFAICT, the reason is as follows.  Since there is no comment-end,
>> re-search-forward in comment-enter-backward returns nil, so the second
>> clause of the cond gets evaluated.  But since in the first clause, point
>> moved to point-min, (car (syntax-after (- (point) 1))) evaluates to nil,
>> which is a wrong type argument for logand.  So point should be restored:
>
> Thank you, I've installed it,
> And sorry about the delay,
>
>
>         Stefan

Thanks!

Steve Berman