Factorio Forums

Instructions:

• Open Factorio without any mods.
• Load the save save0.zip (attached).
• Select the Landfill in the player inventory, Change landfill placement size to 1x1. Observe that the player has 24 Landfill. (screenshot in before.jpg)
• Place Landfill in the tile directly below the player.

Result:

(Screenshot in after.jpg, log file in factorio-current.log) Landfill is placed in 3 blocks in a 2x2 square around the player. The player's inventory shows they have 23 Landfill. There are two bugs here:

• (Major) 3 Landfill get placed despite only 1 Landfill getting removed from the player inventory, resulting in duplication of Landfill.
• (Minor) Landfill is placed on a 2x2 square despite the player instruction being to place on a 1x1 square.

Notes on the save:

The save has a full replay. It was played with the mod SimpleSeablock 1.2.0. The following console commands are used in the beginning of the game:
/c game.player.clear_items_inside()
/c game.player.insert{name="landfill",count=24}
Note the first command removes Landfill the player has in their inventory at the start of the game.

I have attached another save file, save1.zip, which also has a replay, which shows me replicating the bug starting from save0.zip with Simple Seablock loaded. Note that the log file and screenshots are not based on this save but come from me replicating the bug in unmodded Factorio.