Unfudge a test for Rakudo. Along the way, make it not attempt to mix …

…in to constants (which should fail, but currently doesn't in Rakudo nor Niecza).

S14-roles/mixin.t

@@ -43,18 +43,16 @@ is $y.answer,   13,         'attribute from multi-role mixing OK';
 is $y.test,     42,         'method from other role was OK too';
 
 
-#?rakudo skip 'sub form of mixins'
 {
     role Answer { has $.answer is rw }
-    my $x = 0;
-    $x does Answer(42);
+    my $x = 0 but Answer(42);
     is $x.answer,   42,         'role mix-in with initialization value worked';
     is $x,          0,          'mixing into Int still makes it function as an Int';
 }
 
-#?rakudo skip 'sub form of mixins'
+
 {
-    my $x = 0;
+    my $x = C1.new();
     role A { has $.a is rw }
     role B { has $.b is rw }
     $x does A(1);
@@ -77,7 +75,6 @@ is $y.test,     42,         'method from other role was OK too';
 
 # L<S14/Run-time Mixins/"but only if the role supplies exactly one attribute">
 
-#?rakudo skip 'sub form of mixin'
 {
     role R4a {
         # no attribute here