Re: How to debug Error during redisplay

[Leo Liu]

On 2013-01-12 17:43 +0800, Eli Zaretskii wrote:
> I downloaded the current snapshot of slime from
> http://common-lisp.net/project/slime/.  Is this the package you are
> talking about?  The only *.el file that calls animate-string there is
> slime-banner.el:
>
>   (defun slime-startup-message ()
>     (when slime-header-line-p
>       (setq header-line-format 
>           (format "%s  Port: %s  Pid: %s"
>                   (slime-lisp-implementation-type)
>                   (slime-connection-port (slime-connection))
>                   (slime-pid))))
>     (when (zerop (buffer-size))
>       (let ((welcome (concat "; SLIME " (or (slime-changelog-date) 
>                                           "- ChangeLog file not found"))))
>       (if slime-startup-animation
>           (animate-string welcome 0 0) 
>         (insert welcome)))))
>
> Is this the code that produced the redisplay error messages?  If so, I
> cannot reproduce this on my machine.  If this isn't the code in
> question, then please show a minimal code snippet using animate-string
> that does reproduce the problem.  (It isn't right to let me guess like
> this, if you want the problem solved any time soon.)

Thanks for taking the trouble to investigate the issue further. I have
just spent an hour to come up with this reproduction recipe.

1. Install adaptive-wrap.el from ELPA
2. Install sbcl or clisp or any CL supported by slime
1. Emacs -q -l t.el (t.el assumes sbcl, which you may want to change)
2. M-x slime

My whole *Messages* buffer looks like this:

--------------------------------
For information about GNU Emacs and the GNU system, type C-h C-a.
`flet' is an obsolete macro (as of 24.3); use either `cl-flet' or `cl-letf'. 
[11 times]
Polling "/var/folders/mf/8_qnj_n146d0wxb32wdnb9jh0000gn/T/slime.13675" .. 1 
(Abort with `M-x slime-abort-connection'.)
Polling "/var/folders/mf/8_qnj_n146d0wxb32wdnb9jh0000gn/T/slime.13675" .. 2 
(Abort with `M-x slime-abort-connection'.)
Polling "/var/folders/mf/8_qnj_n146d0wxb32wdnb9jh0000gn/T/slime.13675" .. 3 
(Abort with `M-x slime-abort-connection'.)
Polling "/var/folders/mf/8_qnj_n146d0wxb32wdnb9jh0000gn/T/slime.13675" .. 4 
(Abort with `M-x slime-abort-connection'.)
Connecting to Swank on port 60501..
Error during redisplay: (jit-lock-function 1) signaled (wrong-type-argument 
stringp nil)
Error during redisplay: (jit-lock-function 520) signaled (wrong-type-argument 
stringp nil)
Error during redisplay: (jit-lock-function 1) signaled (wrong-type-argument 
stringp nil) [2 times]
Connected. Let the hacking commence!
--------------------------------

t.el
Description: t.el