Re: sbcl bug in ppsition and/or find with :start, :end and :key

budden escribió:
Good time of day!

I failed to post this to sbcl-help mail list, so posting here

(find :a '((:c) 1) :start 0 :end 1 :key #'car)
=>error (attempted to call (car 1))

My sbcl gives a more meaningul error message:

>The value 1 is not of type LIST.
> [Condition of type TYPE-ERROR]

It doesn't seem to be a bug in SBCL.


And even
(defun foo () (declare (notinline find)) (find :a '((:c) 1) :start 0 :end 1 :key 'car))
(foo)
=>error (attempted to call (car 1))

Why does sbcl access second element of list?

Because it can't find :a in the first. It keeps searching till :end is reached. You are using #'car to extract the value to be compared (the key) against :a from each element of the sequence. Try

(find :a '((:c) 1) :start 0 :end 1)

or

(find :a '((:c) (1)) :start 0 :end 1 :key #'car)

and you'll see.

hth,

Leandro


(lisp-implementation-type)
"SBCL"
(lisp-implementation-version)
"1.0.20"

debian etch i686

.

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