Minecraft wont launch.

[The Fire Man]

It just wont launch. 

it said this

11:43:37

game

 

info

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51]

11:43:37

game

 

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at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51]

11:43:37

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at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]

11:43:37

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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

11:43:37

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at net.minecraft.client.Minecraft.<init>(Minecraft.java:258) ~[bib.class:?]

11:43:37

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at net.minecraft.client.main.Main.main(SourceFile:123) ~[Main.class:?]

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... 6 more

11:43:37

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Caused by: java.lang.ClassNotFoundException: net.optifine.util.GlyphAdvanceFixed

11:43:37

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at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]

11:43:37

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at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51]

11:43:37

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at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51]

11:43:37

game

 

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at net.minecraft.client.Minecraft.<init>(Minecraft.java:258) ~[bib.class:?]

11:43:37

game

 

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at net.minecraft.client.main.Main.main(SourceFile:123) ~[Main.class:?]

11:43:37

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... 6 more

11:43:37

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Caused by: java.lang.IncompatibleClassChangeError: Implementing class

11:43:37

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at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_51]

11:43:37

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at java.lang.ClassLoader.defineClass(ClassLoader.java:760) ~[?:1.8.0_51]

11:43:37

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at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0_51]

11:43:37

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at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.12.jar:?]

11:43:37

game

 

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at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51]

11:43:37

game

 

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at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51]

11:43:37

game

 

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at net.minecraft.client.Minecraft.<init>(Minecraft.java:258) ~[bib.class:?]

11:43:37

game

 

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at net.minecraft.client.main.Main.main(SourceFile:123) ~[Main.class:?]

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... 6 more

11:43:37

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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

11:43:37

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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)

11:43:37

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[11:43:37] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.SecurityManager.checkExit(SecurityManager.java:761)

11:43:37

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[11:43:37] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.Runtime.exit(Runtime.java:107)

11:43:37

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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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info

[11:43:37] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)

11:43:37

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info

[11:43:37] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

[DiamondMiner88]

Right, when posting logs, post the latest.log in %appdata%/.minecraft/logs, don't post what the launcher says, too much unnecessary formatting. Dark mode users can barely read it. What version are you using.