bug#13802: stack overflow in mm-add-meta-html-tag

[Juri Linkov]

> I see a "Stack overflow in regexp matcher" error traceable back to
> lisp/gnus/mm-decode.el func ‘mm-add-meta-html-tag’ fragment:
>
>   (re-search-forward "\
>   <meta\\s-+http-equiv=[\"']?content-type[\"']?\\s-+content=[\"']\
>   text/\\(\\sw+\\)\\(?:\;\\s-*charset=\\(.+\\)\\)?[\"'][^>]*>" nil t)
>
> To allow the user (not me) to continue, i kludged the form to be:
>
>   (ignore-errors
>     (re-search-forward "..." nil t))
>
> that is, wrapping w/ ‘ignore-errors’.  Is there a better solution?

`sgml-html-meta-auto-coding-function' uses a similar regexp
that doesn't fail with stack overflow.  You could get some ideas
from this regexp and sync the regexp in `mm-add-meta-html-tag' with it.