Re: [Sbcl-bugs] array equality testing

You are not allowed to modify literal constants.

On Wed, Feb 11, 2026 at 6:55 PM Richard Holcombe <[email protected]> wrote:
>
> I have the following piece of code:
>  (let ((vect #(0))
>        (newv #(3)))
>    (setf (aref vect 0) 3)
>    (list vect newv (equalp vect news)))
>
> if I start sbcl 2.4.11 and run this code, I get
> (#(3) #(3) NIL)
>
> If I then execute
>  (declaim (optimize (debug 3)))
> and re-run it, I get
> (#(3) #(3) T)
>
> If I do the same with sbcl 2.6.0, I get (#(3) #(3) NIL) regardless of the debug setting.
> I thought that equalp of two arrays of equal numbers should return T.
>
> Richard
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