There is some kind of combination of mouse press and keyboard press that will crash my client. This mainly/only seems to happen when I either use inventory view from Ars Nouveau's storage lectern or from the crafting view from Applied Energistic 2.

It's hard to pinpoint the exakt combination since by the time I notice that it's crashed I might have pressed multiple buttons. I suspect that it has something to do with shift+right mouse button.

I suspect this might also be in a combination with the mod Mouse Tweaks.

Logs:
See line 12528: https://mclo.gs/fSHVOYB#L12528

I will try to figure out more specifically what mouse and keyboard combo is responsible.

New crashlog:
https://mclo.gs/IO2UwAv
This time I'm pretty sure that what I did was first press back on the mouse with my thumb with the pointer over the storage lectern inventory and then I pressed the right mouse button in the space between the inventory and the list for JEI.

More testing done. Just pressing "back", assigned to "Button 4", crashes the game while in the storage lectern inventory. After disabling Zeta (and Quark) the crash no longer occurs. Enabling the mod again crashes the game.