sudo -i invalid escaping

Ubuntu release: 11.04
Sudo package: 1.7.4p4-5ubuntu7.1

Current sudo version escapes commands so that they can never match anything in sudoers when using -i parameter (login shell).

What is expected (happens in 1.7.2 (ie. Ubuntu 10.04) and 1.7.5):

sudoers:
Cmnd_Alias COMMAND=/bin/bash -c /foo/bar/test.sh

command:
$ sudo -i /foo/bar/test.sh

sudo sees the command like this:
COMMAND=/bin/bash -c /foo/bar/test.sh

And the command matches the rule in sudoers and is executed.

What happens instead:
When running
$ sudo -i /foo/bar/test.sh

the command fails because it doesn't match anything in sudoers, because sudo escapes the command to this:
COMMAND=/bin/bash -c \/foo\/bar\/test\.sh

and that won't match the command in sudoers because of the backslashes. It is also not possible to make similar escaping in sudoers file as you get syntax error.

I couldn't find any workaround for this, so it seems to be quite critical. The fix should probably be backported from sudo 1.7.5.

See sudo bug #451 http://www.sudo.ws/sudo/bugs/show_bug.cgi?id=451