Well, it's kind of you to say that, but given the fact that Perl 6 changed =~ to ~~, it arguably was a design error. (Though this particular failure mode is not why it was changed, but rather the failure of reversing the operator to say ~= instead. It doesn't matter if you reverse ~~.) Anyway, if you split ~~ in Perl 6 with whitespace, it'll parse, but will likely give you a "useless use of ~ in void context" warning.

By the way, Perl 6 also fixes the "print (4+5)*20" faq...