Salut, dès que je met les mods Buildcraft et Openblocks, Minecraft crash me redirigeant ver mon launcher. Voici le game output (j'ai pas de crash report) 
[17:58:44] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[17:58:44] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[17:58:44] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
[17:58:44] [main/INFO] [FML]: Forge Mod Loader version 7.10.85.1230 for Minecraft 1.7.10 loading
[17:58:44] [main/INFO] [FML]: Java is Java HotSpot(TM) Client VM, version 1.8.0_11, running on Windows 7:x86:6.1, installed at C:\Program Files (x86)\Java\jre8
[17:58:45] [main/WARN] [FML]: The coremod codechicken.core.launch.CodeChickenCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[17:58:46] [main/WARN] [FML]: The coremod cofh.asm.LoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[17:58:46] [main/WARN] [FML]: The coremod codechicken.core.launch.DepLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[17:58:46] [main/WARN] [FML]: The coremod invtweaks.forge.asm.FMLPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[17:58:46] [main/WARN] [FML]: The coremod mekanism.common.asm.LoadingHook does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[17:58:46] [main/WARN] [FML]: The coremod codechicken.nei.asm.NEICorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[17:58:46] [main/WARN] [FML]: The coremod openblocks.OpenBlocksCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[17:58:46] [main/INFO] [FML]: Loading tweaker optifine.OptiFineForgeTweaker from OptiFine_1.7.10_HD_U_A4.jar
[17:58:46] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortin
gTweaker
[17:58:46] [main/INFO] [LaunchWrapper]: Loading tweak class name optifine.OptiFineForgeTweaker
[17:58:46] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
[17:58:46] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortin
gTweaker
[17:58:46] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortin
gTweaker
[17:58:46] [main/INFO] [LaunchWrapper]: Calling tweak class optifine.OptiFineForgeTweaker
[17:58:46] [main/INFO] [STDOUT]: [optifine.OptiFineForgeTweaker:dbg:49]: OptiFineForgeTweaker: acceptOptions
[17:58:46] [main/INFO] [STDOUT]: [optifine.OptiFineForgeTweaker:dbg:49]: OptiFineForgeTweaker: injectIntoClassLoader
[17:58:46] [main/INFO] [STDOUT]: [optifine.OptiFineClassTransformer:dbg:179]: OptiFine ClassTransformer
[17:58:46] [main/INFO] [STDOUT]: [optifine.OptiFineClassTransformer:dbg:179]: OptiFine URL: file:/C:/Users/Ariel/AppData/Roaming/.minecraft/mo
ds/OptiFine_1.7.10_HD_U_A4.jar
[17:58:46] [main/INFO] [STDOUT]: [optifine.OptiFineClassTransformer:dbg:179]: OptiFine ZIP file: java.util.zip.ZipFile@b19b79
[17:58:46] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWr
apper
[17:58:48] [main/INFO] [FML]: Found valid fingerprint for Minecraft Forge. Certificate fingerprint e3c3d50c7c986df74c645c0ac54639741c90a557
[17:58:48] [main/INFO] [FML]: Found valid fingerprint for Minecraft. Certificate fingerprint cd99959656f753dc28d863b46769f7f8fbaefcfc
[17:58:48] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWr
apper
[17:58:48] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWr
apper
[17:58:49] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWr
apper
[17:58:49] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWr
apper
[17:58:49] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWr
apper
[17:58:49] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWr
apper
[17:58:49] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWr
apper
[17:58:49] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWr
apper
[17:58:49] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWr
apper
Exception in thread "main" [17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
java.lang.NoClassDefFoundError: openmods/asm/VisitorHelper$TransformProvider
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
at java.lang.Class.getDeclaredConstructors0(Native Method)
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
at java.lang.Class.privateGetDeclaredConstructors(Unk
nown
Source)
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
at java.lang.Class.getConstructor0(Unknown Source)
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
at java.lang.Class.newInstance(Unknown Source)
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
at net.minecraft.launchwrapper.LaunchClassLoader.regi
sterTransformer(LaunchClassLoader.java:88)
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
at cpw.mods.fml.relauncher.CoreModManager$FMLPluginWr
apper.injectIntoClassLoader(CoreModManager.java:10
1)
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
at net.minecraft.launchwrapper.Launch.launch(Launch.j
ava:115)
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
at net.minecraft.launchwrapper.Launch.main(Launch.jav
a:28)
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
Caused by: java.lang.ClassNotFoundException: openmods.asm.VisitorHelper$TransformProvider
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
at net.minecraft.launchwrapper.LaunchClassLoader.find
Class(LaunchClassLoader.java:191)
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
at java.lang.ClassLoader.loadClass(Unknown Source)
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
at java.lang.ClassLoader.loadClass(Unknown Source)
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
... 8 more
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
Caused by: java.lang.NullPointerException
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
at net.minecraft.launchwrapper.LaunchClassLoader.find
Class(LaunchClassLoader.java:182)
[17:58:49] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1
]:
... 10 more
?