http://openeye.openmods.info/crashes/191f1bdc84e20ea6af2562c0c50b78b7

You seem to have two versions of project red.

@kenzierocks No that's the versions that can cause this crash (I think openeye does it like that)
This is the same as #478 although it was said to be unreproducible.

Can't think what it would be, not item damage because it happens when listed in the creative inventory (GuiContainerCreative) which is a controlled item stack.
Maybe it was caused by an update from 1.6 -> 1.7? @0uti is this an old world updated or a new world?

this is a singleplayer creative world and not ported from 1.6.

Found the reason for this error. Yay!

It's a very simple boolean logic issue; the AND function has a higher precedence than the OR function.

In terms of this crash, it is in items.scala:237
stack.hasTagCompound was being ANDed with Keyboard.isKeyDown(Keyboard.KEY_RSHIFT)
THEN ORed with Keyboard.isKeyDown(Keyboard.KEY_LSHIFT)

So like
Keyboard.isKeyDown(Keyboard.KEY_LSHIFT) || (Keyboard.isKeyDown(Keyboard.KEY_RSHIFT) && stack.hasTagCompound))

To fix, simply place brackets around correctly

if ((Keyboard.isKeyDown(Keyboard.KEY_LSHIFT)||Keyboard.isKeyDown(Keyboard.KEY_RSHIFT)) && stack.hasTagCompound)

@0uti OK. Out of pure random messing I was able to reproduce this error. Now time to find the cause.

Edit
Found 2 ways to reproduce this crash

1. In creative inventory hold shift and click on the Search Items tab
2. Again in the creative inventory, in the Search Items textbox, type an upper-case letter (i.e. press shift + letter)

Fixed via aa3e05c

nice one :)