/in/foo.cc: In function 'int main()':
/in/foo.cc:222:21: error: jump to label 'skip_u'
  222 |                     skip_u:;
      |                     ^~~~~~
/in/foo.cc:178:79: note:   from here
  178 |                         if (kind_u == 0 && col_u == new_specials[u_new]) goto skip_u;
      |                                                                               ^~~~~~
/in/foo.cc:180:25: note:   crosses initialization of 'int avail_u'
  180 |                     int avail_u = (u_new < new_K) ? 1 : (u_new == new_ACT ? new_ACT_sz : new_POOL_sz) - offset_u;
      |                         ^~~~~~~