Wrap your @TestObject::ISA setting into a BEGIN block:

BEGIN { our @ISA = qw(Pixie::Object); }
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Otherwise the FETCH_CODE_ATTRIBUTES and MODIFY_CODE_ATTRIBUTES subroutines aren't resolvable when your sub foo : override { } gets compiled.

Then, have a look at what your're checking in the "eval" in your Pixie::Object::new - I guess you mean something like

                # Do something more extreme?
                my @attributes = eval "attributes::get(\\\&$class\::$k
+ey)";
                print "$key : @attributes\n";
                warn "$class already has a method $key; this will be u
+sed instead of field access." .
                      " Attach attribute override to that method if yo
+u would like to suppress this message."
                      unless grep(/^override/,@attributes);
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_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}