[20:33:28] [main/ERROR] [LaunchWrapper]: Unable to launch
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_121]
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_121]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_121]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_121]
     at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
       at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_121]
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_121]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_121]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_121]
     at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]
    at GradleStart.main(GradleStart.java:26) [start/:?]
Caused by: java.lang.UnsatisfiedLinkError: org.lwjgl.DefaultSysImplementation.getPointerSize()I
    at org.lwjgl.DefaultSysImplementation.getPointerSize(Native Method) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
      at org.lwjgl.Sys.<clinit>(Sys.java:118) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
  at net.minecraft.client.Minecraft.getSystemTime(Minecraft.java:3033) ~[Minecraft.class:?]
      at net.minecraft.client.main.Main.main(Main.java:42) ~[Main.class:?]
   ... 12 more
Exception in thread "main" [20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: java.lang.reflect.InvocationTargetException
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:        at java.lang.reflect.Method.invoke(Method.java:498)
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:        at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:        at GradleStart.main(GradleStart.java:26)
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: Caused by: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]:        at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]:        at java.lang.SecurityManager.checkExit(SecurityManager.java:761)
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]:        at java.lang.Runtime.exit(Runtime.java:107)
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]:        at java.lang.System.exit(System.java:971)
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]:        at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]:        at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[20:33:28] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]:        ... 6 more
:runClient FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':runClient'.
> Process 'command 'C:\Program Files\Java\jdk1.8.0_121\bin\java.exe'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 24.08 secs