[perl #129311] Simple Grammar Goes into infinite loop

[Zoffix Znet via RT]

Here's a much shorter way to reproduce it:

    perl6 -e '"foo" ~~ /(.*)+/'  # hangs

While my previous explanation for why this occurs makes sense, it's worth 
noting this behaviour is not observed in Perl 5, for example:

    perl -e '"foo" =~ /(.*)+/'  # does not hang