I am having an issue running older versions of Minecraft.
Basically, I was casually playing Minecraft 1.6, because I wanted to go on a nostalgia trip. But then, my game crashed while I was in a world. It didn't make sense because I had ran 1.6 before and hadn't crashed. I tested out other versions like beta 1.7.3, 1.12.2, 1.6.4, and they all still crashed.
I don't know if this is an issue with my pc or not, but it only seems to happen with older versions of Mc Java.