Game keeps crashing with JVM.dll and java.lang.ArrayStoreException: arraycopy: source type dyz is not an array

Put the summary of the bug you're having here

What I expected to happen was...:
I would click run and the game would open and I could play.

What actually happened was...:
At first, I could play vanilla Minecraft SOMETIMES. The crash would only happen sometimes. Then, I tried to play modded Minecraft and NOTHING worked. Now, I can't even play vanilla like ever. Sometimes the game will open and I get hope but as soon as I load into a world it crashes again. All with the same error code and crash log. Please help! I have tried everything I could think of and everything I have found online. Seems to be specific to me and my computer no idea why. I even reinstalled windows a few times.

Steps to Reproduce:
1. Open the game
2. Game Crashes
3. Cry