Re: How to search for characters displayed as octal codes in the buffer?

[Noam Postavsky]

On Sun, 14 Jul 2019 at 10:50, ndame <emacsuser@freemail.hu> wrote:
>
> Sometimes I have unprintable characters in the buffer which display with an 
> octal code (e.g. \232). instead of a character (text copied from elsewhere, 
> etc.) How can I find these without knowing the exact codes?
>
> I'd like to find all such places in the buffer where a character appears with 
> an octal code, but I have UTF characters too in the buffer which display 
> properly, so using nonascii is not the answer.

(re-search-forward "[\x80-\xff]") seems to work, though it's a bit
awkward to enter interactively:

C-M-s [ C-x 8 RET 3fff80 RET - C-x 8 RET 3fffff RET ]