Unknown how to recreate this.

Begin launcher log;
[18:51:45 INFO]: Minecraft Launcher 1.6.61 (through bootstrap 100) started on windows...
[18:51:45 INFO]: Current time is Aug 29, 2016 6:51:45 PM
[18:51:45 INFO]: System.getProperty('os.name') == 'Windows 10'
[18:51:45 INFO]: System.getProperty('os.version') == '10.0'
[18:51:45 INFO]: System.getProperty('os.arch') == 'amd64'
[18:51:45 INFO]: System.getProperty('java.version') == '1.8.0_25'
[18:51:45 INFO]: System.getProperty('java.vendor') == 'Oracle Corporation'
[18:51:45 INFO]: System.getProperty('sun.arch.data.model') == '64'
[18:51:45 INFO]: proxy == DIRECT
[18:51:45 INFO]: JFX is already initialized
[18:51:45 INFO]: Refreshing local version list...
[18:51:45 INFO]: Refreshing remote version list...
[18:51:46 INFO]: Refresh complete.
[18:51:46 INFO]: Loaded 2 profile(s); selected 'OptiFine'
[18:51:46 INFO]: Refreshing auth...
[18:51:46 INFO]: Logging in with access token
End launcher log;