Hi Robert,
> Thanks for the report. 4020b370f214315b8c10430301898ac21658143f
> includes an attempt at a fix.
Not sure if keeping unitized structure is a good solution in the long
run. However if you are aiming for performance instead of:
```
+ /* Clear fields that cost_material() will consult */
+ matpath.parallel_workers = 0;
matpath.parent = NULL;
```
... you could just rewrite the `if` condition in cost_material():
```
if (path->parent != NULL && /* <--- is false */
path->parallel_workers == 0 &&
```
--
Best regards,
Aleksander Alekseev
