[perl #116002] Signature with flattened array does not match

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# New Ticket Created by  Paweł Pabian 
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For sample class on Rakudo 2012.11

class A { method foo (Int) {} };

signature matches without problem when it is declared directly in code

 say \(A, 1) ~~ A.^find_method("foo").signature;
True

but when signature is created from array it will not match

my @t = 1; say \(A, @t) ~~ A.^find_method("foo").signature;
False

Both signatures looks the same

say \(A, 1).perl
Capture.new( list => (A, 1).list, hash => EnumMap.new())
 say \(A, @t).perl
Capture.new( list => (A, 1).list, hash => EnumMap.new())