tests/pass-group-paren-label-2.nt

   1 00 (11 [mix:8] 22 <mix> (<meow> [meow + mix : 8]) * 3 33) * 2 44
   2 ---
   3 00
   4
   5 11 04 22
   6   08
   7   09
   8   0a
   9 33
  10
  11 11 0b 22
  12   16
  13   17
  14   18
  15 33
  16
  17 44