*** a/contrib/cube/cube.c
--- b/contrib/cube/cube.c
***************
*** 615,621 **** g_cube_picksplit(PG_FUNCTION_ARGS)
  		else
  		{
  			datum_r = union_dr;
! 			size_r = size_alpha;
  			*right++ = i;
  			v->spl_nright++;
  		}
--- 615,621 ----
  		else
  		{
  			datum_r = union_dr;
! 			size_r = size_beta;
  			*right++ = i;
  			v->spl_nright++;
  		}