failed when use Mojo::UserAgent in some process whose name ($0) not valid for FindBin module

I have use Mojo::UserAgent in AnyEvent::Fork module, some error will be thrown out like this:

      Cannot find current script [AnyEvent::Fork 23476]

which is a exception thrown from FindBin.pm, and the FindBin.pm module was used in Mojo::Server, and which was used in Mojo::UserAgent : 

      use Mojo::Base 'Mojo::Server';  # at Mojo::Server::Daemon

so I think Mojo::UserAgent should not has such a constraint : can not used in process whose name was not accepted by the FindBin module.

than I add the following code in Mojo::Server: 

         BEGIN{ $__PACKAGE__::zsave = $0 ; $0 = '-e' }
         UNITCHECK{ $0 = $__PACKAGE__::zsave }
         use FindBin;

by set $0 to "-e" temp , let use FindBin works. then reset it to the origin value when the module loaded.

maybe some other method is better, whatever , hope you fix it !