Setting an EVAL scope, savestack=25
   4 <{x1}> <[x2]>        |  1:  IFMATCH[-1]
   3 <{x1> <}[x2]>        |  3:    OPEN1
   3 <{x1> <}[x2]>        |  5:    ANYOF[)>\]}]
   4 <{x1}> <[x2]>        | 16:    CLOSE1
   4 <{x1}> <[x2]>        | 18:    SUCCEED
                              could match...
   4 <{x1}> <[x2]>        | 20:  IFMATCH[-0]
   4 <{x1}> <[x2]>        | 22:    OPEN2
   4 <{x1}> <[x2]>        | 24:    ANYOF[(<[{]
   5 <{x1}[> <x2]>        | 35:    CLOSE2
   5 <{x1}[> <x2]>        | 37:    SUCCEED
                              could match...
   4 <{x1}> <[x2]>        | 39:  EVAL
  re_eval 0x10033008
Match 1: left }, right [
   4 <{x1}> <[x2]>        | 41:  END
Match successful!