[ESS] what is font-lock-pre-idle-hook

[Jean Eid]

No sweat, Thanks a lot....

Jean

On Fri, 17 Dec 2004, Stephen Eglen wrote:

> Stephen Eglen writes:
>  >
>  >  > It has nothing to do with the ESS R buffer. i.e it has something to do
>  >  > with loading .R files only. So if I load a .R file and I edited outside
>  >  > the buffer (e.g. through pico or something) I get the message.
>  >  >
>  >  > shortest example:
>  >  > touch temp.R
>  >  > xemacs temp.R
>  >  > ls > temp.R # in gnome-terminal or something and go back to xemacs
>  >  > Mx revert-buffer
>  >
>  > Thanks for this - I can now reproduce the warning; will investigate
>  > sometime - although it is a minor warning, it may have consequences
>  > elsewhere.
>
> Ok, looks to me like an XEmacs bug, as several other modes report same
> problem.  Notably, ProofGeneral says the following:
> http://proofgeneral.inf.ed.ac.uk/BUGS
>
> ----
> XEmacs font-lock problem in certain versions of XEmacs 21.4
>
> When reloading (with C-x C-f) an already loaded script file that has
> been changed on the file system you see the error:
>
> (1) (warning/warning) Error caught in `font-lock-pre-idle-hook':
>     (wrong-type-argument markerp nil)
>
> As a result fontification, etc, fails. Workaround: use C-x C-v
> instead. This problem has gone away since 21.4.12 or so.
>
> Update: this has reappeared in version 21.4.15.
> ----
>
> So, sorry, no joy for fixing this one.
>
> best wishes,
> Stephen
>