Sorry for the duplicate just found the previous posts on this one.

On Tue, Aug 10, 2010 at 7:40 PM, Matthew M. Boedicker <
matthewm@boedicker.org> wrote:

> The rack 1.2.1 gem breaks on ruby < 1.8.7 because Regexp.union does not
> take an array argument. This patch fixes it. If you are opposed to changing
> things to support very old versions of ruby maybe at least the gem could
> require ruby 1.8.7 or greater.
>
>