[BusyBox] backref problem with sed?

[Matt Kraai]

On Mon, Aug 20, 2001 at 02:22:26PM -0600, Jim Gleason (Admin) wrote:
> The problem is actually with line 549 of sed.c and its call to "regexec()".
> The 3rd parameter "sed_cmd->num_backrefs+1" forces at least one character to
> be matched (according to how I read the regexec man pages).  This character
> is then output in the "print_subst_w_backrefs()" function called in the
> loop.  I'm not sure what the correct solution is however, so I turn it over
> to the group for now.

I think we need to check that the backref indexes a match that is
in range, and that was actually matched.  I just checked in code
which does so.

Matt