Subject: bug#64537: mix lists and vectors when using backquote

From: Stefan Monnier <[email-masked]>
Date: Fri, 22 Sep 2023 11:03:31 -0400

>> The docstring of ‘backquote’ says “vectors work just like lists”.
>> Should we also clarify that mixing lists and vectors these 2 way:
>>
>>     `(... ,@[...])  ; by contrast: `(,@[] 1)  => (1)
>>     `[,@'()]        ; by contrast: `[1 ,@'()] => [1]
>>
>> will lead to unexpected behavior?  Or suggest not doing so?  Or let
>> ‘backquote’ detect this and signal an error?
>
> Copying in Stefan Monnier.

Is there a good reason why we have those unexpected behaviors?

        Stefan