[perl #77056] A run-time error in MAIN() dispatch leads to USAGE call, not to a proper error message

[via RT]

# New Ticket Created by  Moritz Lenz 
# Please include the string:  [perl #77056]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=77056 >


22:31 < moritz_> rakudo: sub MAIN($x = unknown_function()) { };
22:31 <+p6eval> rakudo 0e5edb: OUTPUT«Usage:␤/tmp/xxCYRgfKfJ [x]␤»

Found by Eddward++