Like I said it happens like this 

(Image removed from quote.)

Maybe your adding decal on that walls?

Ive had that many vertices for a long time now and they never made a problem

Ive had that many vertices for a long time now and they never made a problem

Check your inbox

I got rid of it and its all going good now thanks for all the replies and support.
I figured it out myself though but you guys motivated me for it,
I made a bevel earlier today and i clicked something wrong on the primitives on cap or something and, i found the invincible brush it was like ehm pretty big and made the compiler crash but its all good now