[Catalyst] Why does $c->stats require -Debug flag?

[Richard Jones]

I've just tried to run my app. without the -Debug flag and now I just 
get the '(en) Please come back later' (+ several other languages) error 
page. I've traced it to the use of $c->stats in the end() method in the 
Root controller, which is an ActionClass('RenderView') method:

[error] Caught exception in MyApp::Controller::Root->end "Can't call 
method "accept" on an undefined value at ... etc

$c->stats->accept() is used in generating script timing reports (Cory 
Watson: Adding Action Timings To Your Output), and works fine if -Debug 
is enabled.

Nothing else seems adversely affected by removing -Debug. 
Catalyst::Stats is up to date, and the docs suggest it should 
automatically be accessible via $c->stats. Any ideas anyone?
-- 
Richard Jones