Subject: Re: bug#24738: 26.0.50; Incorrect Edebug spec for seq-let

From: Nicolas Petton <[email-masked]>
Date: Thu, 20 Oct 2016 10:03:34 +0200

Gemini Lasswell <[email-masked]> writes:

Hi Gemini,

> The Edebug spec for seq-let is incorrect, causing code that uses it to
> not work correctly while instrumented for debugging.
>
> To reproduce:
>
> 1. emacs -Q
> 2. enter the following code into *scratch*:
>
> (defun seq-let-bug ()
>   (let ((nums [1 2 3 4 5]))
>     (seq-let (a b c) nums
>       (message "a=%s b=%s c=%s" a b c))))
>
> 3. C-u C-M-x
> 4. M-: (seq-let-bug) RET
>
> Result: a=nil b=nil c=nil
> Expected result: a=1 b=2 c=3

Indeed, thanks for reporting!

>
> Changing seq-let's edebug spec to (debug (sexp form body))
> fixes this for me.

Why sexp instead of form for the first argument?

Cheers,
Nico