It just wont launch.
it said this
11:43:37
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at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51]
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at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51]
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at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
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at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
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Caused by: java.lang.NoClassDefFoundError: net/optifine/util/GlyphAdvanceFixed
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at net.minecraft.client.Minecraft.<init>(Minecraft.java:258) ~[bib.class:?]
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at net.minecraft.client.main.Main.main(SourceFile:123) ~[Main.class:?]
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... 6 more
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Caused by: java.lang.ClassNotFoundException: net.optifine.util.GlyphAdvanceFixed
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at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
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at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51]
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at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51]
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at net.minecraft.client.Minecraft.<init>(Minecraft.java:258) ~[bib.class:?]
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at net.minecraft.client.main.Main.main(SourceFile:123) ~[Main.class:?]
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... 6 more
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Caused by: java.lang.IncompatibleClassChangeError: Implementing class
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at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_51]
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at java.lang.ClassLoader.defineClass(ClassLoader.java:760) ~[?:1.8.0_51]
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at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0_51]
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at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.12.jar:?]
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at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51]
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at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51]
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at net.minecraft.client.Minecraft.<init>(Minecraft.java:258) ~[bib.class:?]
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at net.minecraft.client.main.Main.main(SourceFile:123) ~[Main.class:?]
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... 6 more
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Exception in thread "Client thread" [11:43:37] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
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[11:43:37] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
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[11:43:37] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.SecurityManager.checkExit(SecurityManager.java:761)
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[11:43:37] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.Runtime.exit(Runtime.java:107)
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[11:43:37] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.System.exit(System.java:971)
11:43:37
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[11:43:37] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)
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[11:43:37] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)