Minecraft Crashes On Startup When Using Forge

[TTypo]

Hi, sorry if I'm doing something wrong, I'm new to these forums, and to forge in general. I just installed forge, and when I start it up it crashes and I get the following message:

 

2016-05-18 09:51:48,626 WARN Unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream

2016-05-18 09:51:48,627 WARN Unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream

[09:51:48] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker

[09:51:48] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker

[09:51:48] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker

[09:51:48] [main/INFO] [FML]: Forge Mod Loader version 12.16.1.1908 for Minecraft 1.9 loading

[09:51:48] [main/INFO] [FML]: Java is Java HotSpot 64-Bit Server VM, version 1.8.0_25, running on Windows 10:amd64:10.0, installed at C:\Program Files (x86)\Minecraft\runtime\jre-x64\1.8.0_25

[09:51:48] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker

[09:51:48] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker

[09:51:48] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker

[09:51:48] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker

[09:51:48] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper

[09:51:49] [main/ERROR] [LaunchWrapper]: Unable to launch

java.lang.RuntimeException: java.lang.NullPointerException

at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:161) ~[forge-1.9.4-12.16.1.1908-1.9.4.jar:?]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]

Caused by: java.lang.NullPointerException

at LZMA.LzmaInputStream.readHeader(LzmaInputStream.java:246) ~[lzma-0.0.1.jar:?]

at LZMA.LzmaInputStream.<init>(LzmaInputStream.java:65) ~[lzma-0.0.1.jar:?]

at net.minecraftforge.fml.common.asm.transformers.deobf.LZMAInputSupplier.openStream(LZMAInputSupplier.java:33) ~[forge-1.9.4-12.16.1.1908-1.9.4.jar:?]

at com.google.common.io.ByteSource$AsCharSource.openStream(ByteSource.java:435) ~[guava-17.0.jar:?]

at com.google.common.io.CharSource.openBufferedStream(CharSource.java:106) ~[guava-17.0.jar:?]

at com.google.common.io.CharSource.readLines(CharSource.java:205) ~[guava-17.0.jar:?]

at net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.setup(FMLDeobfuscatingRemapper.java:126) ~[forge-1.9.4-12.16.1.1908-1.9.4.jar:?]

at net.minecraftforge.fml.common.asm.FMLSanityChecker.injectData(FMLSanityChecker.java:182) ~[forge-1.9.4-12.16.1.1908-1.9.4.jar:?]

at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:156) ~[forge-1.9.4-12.16.1.1908-1.9.4.jar:?]

... 2 more

Exception in thread "main" [09:51:49] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException

[09:51:49] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:30)

[09:51:49] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.SecurityManager.checkExit(SecurityManager.java:761)

[09:51:49] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.Runtime.exit(Runtime.java:107)

[09:51:49] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.System.exit(System.java:968)

[09:51:49] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)

[09:51:49] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

 

I have tried a few fixes, but none of them worked. Please help me!

[mmarciano]

Same error with me.

Just installed minecraft v1.9.4 and Forge 1.9.4.

Looks like some problem with the latest Java 8u91.

[LexManos]

1.9.4 builds were temporarily broken, re-download should be fine now. Make sure you've cleared you cache before redownloading.