Factorio Forums

• What did you do?
  I right-clicked a stack of red science packs (there were about 9 in the stack) inside the research lab window.
• What happened?
  After right-clicking, i picked up half the stack into my cursor (The "Remaining" of the science pack is at the value it was in the lab, e.g. 40%). When i right-clicked now into the lab slot where the other red science half is, i deposit one out of my cursor into the lab. However, i noticed that the "Remaining" value of the science pack that is currently being used by the lab, as well as the science packs held in the cursor are reset to 100%. This only happens when you deposit one item into the slot via right-clicking, NOT when depositing the whole cursor stack with left-clicking, effectively leading to an "infinite science pack" glitch where one can stay in the lab window, repeatedly right-clicking the science pack slot in the lab, replenishing the science packs over and over again. It only works if the stack has 3 or more items. It does not work with 2 or 1 item, it does not get replenished there and science pack usage is as expected there). I managed to research a 10 red pack science with only 5 packs.
• What did you expect to happen instead? It might be obvious to you, but do it anyway!
  Science pack usage gets saved per-pack and when repeatedly removing and adding science packs the usage is accurately tracked.
• Does it happen always, once, or sometimes?
  This happenes always. Restarting the game, reloading the save, or even starting a whole new save did not matter.

• Steps to reproduce:
• Research red science and research labs and set up a lab with power.
• Craft at least 3 red science packs.
• Set any red science research (for example green science).
• Insert all 3 packs into the lab to start research.
• Wait for the first science pack to be used up a bit.
• Right-click the science pack stack in the lab to pick up half the stack into your cursor.
• Notice that the "Remaining" of the science pack in the cursor is accurate (e.g. 50%).
• Right-click the science pack stack in the lab again to deposit one pack back into the lab.
• Notice that both the science pack left in the cursor as well as the science pack in the lab get replenished to 100%.
• Continuesly right-click the lab science pack slot every half second or so to effectively unlock infinite research.

Doing this i was able to research green science with just 3 red science packs ever crafted.
It is easily possible to set up an auto-clicker to do this for you.
Log and game save in the attachments.

Some screenshots:

Thanks for the report. Issue is now fixed for 2.0.9