bug#14303: 24.3; Bug in comment-search-backward

[Leo Liu]

On 2013-05-17 21:28 +0800, Stefan Monnier wrote:
> I don't understand when that can happen (when inside a string (nth
> 8 ppss) is also non-nil).

I have

(defvar octave-comment-start-skip "\\(^\\|\\S<\\)\\(?:%!\\|\\s<+\\)\\s-*"
  "Octave-specific `comment-start-skip' (which see).")

and this could find "#abc" as comment start where BEG is outside of
strings and comments but END is in a string.

Maybe this is due to setting octave-comment-start-skip incorrectly.

I looked at comment-normalize-vars and see it uses:

  \\(\\(^\\|[^\\\n]\\)\\(\\\\\\\\\\)*\\)

as anchor but I don't understand fully.

Leo