java crash

---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 6.12.17 20:57
Description: Failed to start game

java.lang.NullPointerException
at java.io.Reader.<init>(Reader.java:78)
at java.io.InputStreamReader.<init>(InputStreamReader.java:97)
at ak.a(SourceFile:56)
at ak.a(SourceFile:91)
at net.minecraft.client.Minecraft.a(SourceFile:250)
at net.minecraft.client.Minecraft.run(SourceFile:516)
at java.lang.Thread.run(Thread.java:745)

Relevant Details:

• Minecraft Version: 1.3.1
• Operating System: Windows 8.1 (amd64) version 6.3
• Java Version: 1.8.0_25, Oracle Corporation
• Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
• Memory: 165627944 bytes (157 MB) / 201326592 bytes (192 MB) up to 1073741824 bytes (1024 MB)
• JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
• LWJGL: 2.9.0
• OpenGL: Intel(R) HD Graphics 4600 GL version 4.2.0 - Build 10.18.10.3496, Intel
• Is Modded: Probably not
• Type: Client
• Texture Pack: Default
• Profiler Position: N/A (disabled)