Re: c-mode imenu: Stack overflow in regexp matcher

[Glenn Morris]

Stefan Monnier wrote:

> Please try and play with the text being matched to try and see which
> part of the regexp is causing an overflow. Most likely the problem
> is that something is matching a much longer text than expected (e.g.
> tens/hundreds of nonempty lines rather than 1 or 2).
>
> Maybe it's the beginning: "^\\<[^()]*" since the \< only implies
> that the first char will be a word-constituent, and the [^()]* can
> then match any number of chars as long as there's no intervening
> parenthesis, which seems quite possible in a long comment.

This will do it:

(goto-char (point-max))
(re-search-backward "^\\<[^()]*[^[:alnum:]_:<>~]")

It matches the whole of etc/splash.xpm from "static char..." right
through to the end, some 60000 odd characters later.