Sign/Chunk Crash the Game

---- Minecraft Crash Report ----
// Sorry

Time: 26.09.15 15:09
Description: Batching chunks

java.lang.NullPointerException: Batching chunks
at cj.<init>(SourceFile:42)
at bnn.a(SourceFile:64)
at bnn.run(SourceFile:42)
at java.lang.Thread.run(Thread.java:745)

A detailed walkthrough of the error, its code path and all known details is as follows:
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– System Details –
Details:
Minecraft Version: 15w38b
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 196356288 bytes (187 MB) / 277364736 bytes (264 MB) up to 4281597952 bytes (4083 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 15w38b
LWJGL: 2.9.4
OpenGL: ~_ERROR~ RuntimeException: No OpenGL context found in the current thread.
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: Yes
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: BDcraft Sounds Pack.zip (incompatible), Dandelion_4.zip (incompatible)
Current Language: Deutsch (Deutschland)
Profiler Position: N/A (disabled)
CPU: 8x Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz