+allskills passive without crash on death?

[Cypress]

I have a passive skill that gives +1 or -1 'item_allskills'. This is used to constantly update the player's passives, allowing for the useful behavior where calcs can be used on passive skills. It works perfectly, except that the game crashes on death. Even if I make the 'item_allskills' give only +1 all skills, it still crashes on death, so it has nothing to do with hitting negative skill levels. Does anyone know what causes this crash to happen, and if it is possible to fix?

EDIT:
Found a fix, although it will likely only be useful for me. I made it so that the +allskills of the passive is only given if the player has a certain aura activated. Since auras turn off when you die, the passive's allskills will become =0 when you die, resulting in no crash.