Re: elisp--local-variables triggers an error on special input

[tomas]

On Tue, Dec 01, 2020 at 03:36:47PM +0100, Joost Kremers wrote:
> 
> On Tue, Dec 01 2020, tomas@tuxteam.de wrote:
> > On Tue, Dec 01, 2020 at 02:15:48PM +0100, Joost Kremers wrote:
> >> You get that error by just eval'ing:
> >> 
> >>     (insert "((eg \"\C-,\")")
> >> 
> >> in the *scratch* buffer.
> >
> > Hm. I don't. The string just gets inserted:
> >
> >   ((eg "C-,")
> >
> > (as I'd expected).
> 
> What Emacs version are you using?
> 
> Mine is:
> 
> "GNU Emacs 27.1.50 (build 9, x86_64-pc-linux-gnu, GTK+ Version 3.22.30, cairo 
> version 1.15.10)
>  of 2020-11-14"

Mine:

  "28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 2.24.32, cairo version 
1.16.0)
 of 2020-11-30"

I win :-)

> >> So it doesn't seem to be related to `elisp--local-variables`.
> >
> > What does happen if you toggle-debug-on-error before doing
> > that?
> 
> Nothing very interesting:
> 
> ```
> Debugger entered--Lisp error: (error "Invalid modifier in string")
>   read(#<buffer test.el>)
>   elisp--preceding-sexp()
>   elisp--eval-last-sexp(nil)
>   eval-last-sexp(nil)
>   funcall-interactively(eval-last-sexp nil)
>   call-interactively(eval-last-sexp nil nil)
>   command-execute(eval-last-sexp)
> ```

Oh, wait! I forgot the backslash before the 'C'. Now I get the error.

Just evaluating "\C-," gets you the same error. The '\C-,' isn't valid
char escape syntax (AFAIK it only works for ASCII SPACE through SPACE+32).

Sorry for the confusion.

Cheers
 - t

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