[perl #115436] Failure has no type check in constructor which leads to LTA errors

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# New Ticket Created by  Paweł Pabian 
# Please include the string:  [perl #115436]
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# <URL: https://rt.perl.org:443/rt3/Ticket/Display.html?id=115436 >


Rakudo 2012.09

$ perl6 -e 'Failure.new("foo").();'
No such method 'throw' for invocant of type 'Str'
  in method <anon> at src/gen/CORE.setting:9914
  in  at src/gen/Metamodel.pm:2380
  in any find_method_fallback at src/gen/Metamodel.pm:2368
  in any find_method at src/gen/Metamodel.pm:922
  in  at src/gen/BOOTSTRAP.pm:827
  in any  at src/gen/BOOTSTRAP.pm:811
  in block  at -e:1

Those LTA errors can be avoided by adding Exception (or some kind of 
"throwable" if there is any) type check to Failure constructor.