Step to reproduce :
- Create an iron patch just next to an uranium patch
- set up a drill with both ore in its range
- When no sulphuric acid is provided, the drill should mine the iron until exhaustion.
- When sulphuric acid is provided, it should be used when and only when uranium is being mined
- The drill locks itself attempting to mine uranium, as it is missing the requiring fluid ( see viewtopic.php?p=282696 )
- The drill always uses one unit of sulphuric acid per drilling, regardless it outputs iron or uranium