What I expected to happen was...:
The game should start...

What actually happened was...:
After restarting the game because it crashed as a Mouse Event was not found (as klicking FULLSCREEN), Minecraft crashes everytime on the startup of the actual game UI.

Steps to Reproduce:
1. Start MC
2. Go Fullscreen (F11 or in the Options) to crash it
3. Get the following error:

Description: Updating screen events

java.lang.IllegalStateException: Mouse must be created before you can read events
at org.lwjgl.input.Mouse.next(Mouse.java:444)
at bxf.p(SourceFile:381)
at bsu.r(SourceFile:1473)
at bsu.as(SourceFile:877)
at bsu.a(SourceFile:314)
at net.minecraft.client.main.Main.main(SourceFile:120)

4. Close the game entirely
5. Start it up again
(6. Crash before Minecraft Logo screen)

Actual Crash (OpenGL):

Description: Unexpected error

java.lang.RuntimeException: No OpenGL context found in the current thread.
at org.lwjgl.opengl.GLContext.getCapabilities(GLContext.java:124)
at org.lwjgl.opengl.GL11.glGetError(GL11.java:1299)
at bsu.b(SourceFile:822)
at bsu.as(SourceFile:882)
at bsu.a(SourceFile:314)
at net.minecraft.client.main.Main.main(SourceFile:120)

With Resource Packs: [Conquest_.zip, Conquest Models.zip]