Crash when crafting, Build 2.8

[Zarkazm]

Since updating to 2.8, when attempting to craft something even as simple as a crafting table, the game will crash and will throw the below error. Reverting to 2.7 resolved this issue.

Minecraft 1.7.10
Forge 10.13.4.1492
Power Converters 2.8

Crash Report: http://pastebin.com/ZPPSNbmQ

(I would also include the full forge log, but it's too big for pastebin...it keeps killing the page when I paste it in).

[covers1624]

that may be my bad, on a player joining i send all recipes from the server to the client, it may be messing with that.

[Zarkazm]

Confirmed in 2.9 that setting the new config setting to false fixes the issue. Still crashes if set to true, which I assume is expected? (it also defaults to true i noticed).

[covers1624]

Hmm, i can craft stuff in singleplayer.. set them to false for now and ill test it in smp.

[Zarkazm]

The crash was happening in both Singleplayer and SMP for me. Most of my troubleshooting has been done in Singleplayer, but the problem started on SMP.

I can send you my mod list if it helps.

[covers1624]

Nah mod list dosent matter, it is to do with the way i remove and add recipes while the game is running, i need to figure out a way of doing it without creating null data in the recipe map.