Test2::Plugin::BailOnFail, Sub::Override

I know this goes against the grain of this thread, and I'm glad you got it working, but: Test2::Plugin::BailOnFail is basically just five lines of code, and Sub::Override is a more sophisticated version of local *subname = sub { print "overridden" };. As I said, personally, in a case like this I wouldn't depend on those modules at all.