Steps to Reproduce
This appears to involve Extra Utilities 2 Mechanical Users, and Tesseract itself or one of it's libraries.
The "Ticking Entities" in question are Mechanical Users set to infinitely-mine cobblestone using Unbreakable TConstruct Pickaxes.
To reproduce the error, install Extra Utilities 2 and TConstruct (Latest Versions) with Tesseract.
Place a mechanical user, set it to "Use Item on Block" (or Activate Block with Item), set it to Left-Click mode, and then set it to "Upper Left Slot Only".
If the game hasn't died yet, put a TConstruct pickaxe in the upper left slot.
If it still hasn't died yet, build a cobblestone generator in front of it.
If all else fails with reproducing the bug, try disabling Tesseract (and it's libraries), starting a fresh world, building the contraption listed above, and then try re-enabling Tesseract.
Version Info
Steps to Reproduce This appears to involve Extra Utilities 2 Mechanical Users, and Tesseract itself or one of it's libraries. The "Ticking Entities" in question are Mechanical Users set to infinitely-mine cobblestone using Unbreakable TConstruct Pickaxes.
To reproduce the error, install Extra Utilities 2 and TConstruct (Latest Versions) with Tesseract.
Place a mechanical user, set it to "Use Item on Block" (or Activate Block with Item), set it to Left-Click mode, and then set it to "Upper Left Slot Only".
If the game hasn't died yet, put a TConstruct pickaxe in the upper left slot.
If it still hasn't died yet, build a cobblestone generator in front of it.
If all else fails with reproducing the bug, try disabling Tesseract (and it's libraries), starting a fresh world, building the contraption listed above, and then try re-enabling Tesseract.
Crash report (~/logs/latest.log) latest.log