Ignored Arguments

What I expected to happen was...:
Minecraft to launch

What actually happened was...
Completely ignored arguments: [--nativeLauncherVersion, 307]
[15:33:30] [Client thread/INFO]: Setting user: MinYoondini
[15:33:31] [Client thread/INFO]: LWJGL Version: 2.9.4

Steps to Reproduce:
Not sure, it's only happening on my computer.
-Launched mc
-Error happened