Describe the bug
Putting rotten flesh blocks in a soaking pot of coal tar crashes the world when you hover over the resultant item in your inventory.

To Reproduce
Steps to reproduce the behavior:

1. Fill a soaking pot up with coal tar
2. Put in the rotten flesh block and wait the ~5 minutes for crafting
3. Take out the item
4. Hover over the item to see its tooltip in your inventory

Expected behavior
Expected to read the tooltip

Screenshots
N/A

Info (please complete the following information):

• Modpack Version: 2.77.5
• Server or Singleplayer: Singleplayer
• Version the world was created on: 2.77.5

Additional context
No idea

Fixed in dev