World randomly crashing

The world was created in the first beta.
Me and my friends were playing on it in every single release of the betas.

Very rarely it crashed. (I think when clocks, and compasses was in the main slots and get selected/unselected) So we tried to don't use them, or not select them.

Now in 1.2.0.22, after everybody logged out the game crashed in 10 minutes.
After that I did an export to save what I can, and tried to rejoin the world.

From this point my game crashes when I am in this world randomly in 2-5 minutes.
I am just walking around, running, jumping. So not modifying any of the blocks.
I don't have compass or a clock in my inventory, only in the chest, and one clock in an item frame. (But it was there for a long time) So know I think this is an another bug.

I would report what causing it, or create a test world if I would know which part is the devil.

The world is downloadable from here: https://drive.google.com/open?id=0Bwvod2purLX6N2Y4R21qenFmNGs

My computer is:
https://www.acer.com/ac/hu/HU/content/model/NH.GM2EU.004
(only with 500GB Samsung SSD)

Windows updates says no more update. (Not in insider)
Nvidia driver is the newest.

If any information is needed please notify my, and I will try my best, because I'm a software developer too.
Also set the ticket to be private, because it contains a lot of information about my computer.