Make sure %h{|| foo} and @A[|| bar] are handled correctly

src/core.e/array_multislice.pm6

@@ -64,6 +64,11 @@ multi sub postcircumfix:<[; ]>(\SELF, @indices, :$BIND! is raw) is raw {
       !! X::Bind::Slice.new(type => SELF.WHAT).throw
 }
 
+# handle the case of @a[|| 0]
+multi sub postcircumfix:<[; ]>(\initial-SELF, \value, *%_) is raw {
+    postcircumfix:<[; ]>(initial-SELF, value.List, |%_)
+}
+
 # This candidate provides all of the multi-level array access, as well
 # as providing the slow-path for assignment of a multi-level array.
 multi sub postcircumfix:<[; ]>(\initial-SELF, @indices, *%_) is raw {

src/core.e/hash_multislice.pm6

@@ -1,6 +1,12 @@
 # all 6.e specific sub postcircumfix {;} candidates here please
 
 proto sub postcircumfix:<{; }>($, $, *%) is nodal {*}
+
+# handle the case of %h{|| "a"}
+multi sub postcircumfix:<{; }>(\initial-SELF, \value, *%_) is raw {
+    postcircumfix:<{; }>(initial-SELF, value.List, |%_)
+}
+
 multi sub postcircumfix:<{; }>(\initial-SELF, @indices,
   :$exists, :$delete, :$k, :$kv, :$p, :$v
 ) is raw {