Update the test27stars to correctly drift and sort the stars.

src/runner.h

@@ -75,6 +75,7 @@ void runner_do_stars_sort(struct runner *r, struct cell *c, int flag,
                           int cleanup, int clock);
 void runner_do_drift_part(struct runner *r, struct cell *c, int timer);
 void runner_do_drift_gpart(struct runner *r, struct cell *c, int timer);
+void runner_do_drift_spart(struct runner *r, struct cell *c, int timer);
 void runner_do_kick1(struct runner *r, struct cell *c, int timer);
 void runner_do_kick2(struct runner *r, struct cell *c, int timer);
 void runner_do_end_hydro_force(struct runner *r, struct cell *c, int timer);

tests/test27cellsStars.c

@@ -172,13 +172,15 @@ struct cell *make_cell(size_t n, size_t n_stars, double *offset, double size,
   cell->loc[1] = offset[1];
   cell->loc[2] = offset[2];
 
+  cell->stars.ti_old_part = 8;
+  cell->stars.ti_end_min = 8;
+  cell->stars.ti_end_max = 8;
   cell->hydro.ti_old_part = 8;
   cell->hydro.ti_end_min = 8;
   cell->hydro.ti_end_max = 8;
   cell->grav.ti_old_part = 8;
   cell->grav.ti_end_min = 8;
   cell->grav.ti_end_max = 8;
-  cell->stars.ti_end_min = 8;
   cell->nodeID = NODE_ID;
 
   shuffle_particles(cell->hydro.parts, cell->hydro.count);
@@ -187,6 +189,9 @@ struct cell *make_cell(size_t n, size_t n_stars, double *offset, double size,
   cell->hydro.sorted = 0;
   for (int k = 0; k < 13; k++) cell->hydro.sort[k] = NULL;
 
+  cell->stars.sorted = 0;
+  for (int k = 0; k < 13; k++) cell->stars.sort[k] = NULL;
+
   return cell;
 }
 
@@ -415,6 +420,7 @@ int main(int argc, char *argv[]) {
                       perturbation, h_pert);
 
         runner_do_drift_part(&runner, cells[i * 9 + j * 3 + k], 0);
+        runner_do_drift_spart(&runner, cells[i * 9 + j * 3 + k], 0);
 
         runner_do_hydro_sort(&runner, cells[i * 9 + j * 3 + k], 0x1FFF, 0, 0);
         runner_do_stars_sort(&runner, cells[i * 9 + j * 3 + k], 0x1FFF, 0, 0);