Hello,

Giuseppe Lipari <giulipari@gmail.com> writes:

> Dear all,
>
> (I am reposting it here with a more appropriate subject-line, hoping to get
> more attention)
>
> Consider the following org file:
>
> * An example of org file
>
>   Here I put a C snippet
>
>   #+BEGIN_SRC c
>   int main() {
>       printf("hello world\n");
>       return 0;
>   }
>   #+END_SRC

I cannot reproduce the error.

> Debugger entered--Lisp error: (void-variable overlays)
>   htmlize-sorted-overlays-at(1)
>   htmlize-faces-at-point()
>   htmlize-buffer-1()
>   htmlize-region(1 58)

It seems related to htmlize package, not to Org mode. You may want to
report it upstream.

Regards,

--
Nicolas Goaziou