Use of uninitialized value in regexp compilation at jjson.pl line 93.
Use of uninitialized value in regexp compilation at jjson.pl line 93.
Eval-group not allowed at runtime, use re 'eval' in regex m/

(?&VALUE) (?{ $_ = $^R->[1] })

(?(DEFINE)

(?<OBJECT>
 (?{ [$^R, {}] })
  {
    (?: (?&KV) # [[$^R, {}], $k, $v]
 .../ at jjson.pl line 93.