retitle 31146 cl-prin1 infloops when printing list with circularity in the tail
tags 31146 + patch
quit

"Basil L. Contovounesios" <contovob@tcd.ie> writes:

> 1. emacs -Q
> 2. M-x ielm RET
> 3. (let ((l (make-list 2 0)))
>      (nconc l (cdr l)))
> 4. C-m
>      => infloop

Right, though the bug is really about cl-prin1, ielm is just incidental.

Here's a patch.  Hmm, how should cl-defmethod changes be specified in
the ChangeLog?  I just put (cl-print-object), but is there some notation
to indicate it's this particular defmethod?

    (cl-defmethod cl-print-object ((object cons) stream)