Program: 51771
Project: 51771
Buggy source:
public static void injectTransformers(LaunchClassLoader classLoader){
  for (  FMLPluginWrapper wrap : loadPlugins) {
    IFMLLoadingPlugin plug=wrap.coreModInstance;
    if (plug.getASMTransformerClass() != null) {
      for (      String xformClass : plug.getASMTransformerClass()) {
        FMLRelaunchLog.finest("String_Node_Str",xformClass);
        classLoader.registerTransformer(xformClass);
      }
    }
  }
  FMLRelaunchLog.fine("String_Node_Str");
  Map<String,Object> data=new HashMap<String,Object>();
  data.put("String_Node_Str",mcDir);
  data.put("String_Node_Str",loadPlugins);
  data.put("String_Node_Str",!deobfuscatedEnvironment);
  for (  FMLPluginWrapper pluginWrapper : loadPlugins) {
    IFMLLoadingPlugin plugin=pluginWrapper.coreModInstance;
    FMLRelaunchLog.fine("String_Node_Str",pluginWrapper.name);
    data.put("String_Node_Str",pluginWrapper.location);
    plugin.injectData(data);
    String setupClass=plugin.getSetupClass();
    if (setupClass != null) {
      try {
        IFMLCallHook call=(IFMLCallHook)Class.forName(setupClass,true,classLoader).newInstance();
        Map<String,Object> callData=new HashMap<String,Object>();
        callData.put("String_Node_Str",mcDir);
        callData.put("String_Node_Str",classLoader);
        callData.put("String_Node_Str",pluginWrapper.location);
        callData.put("String_Node_Str",FMLInjectionData.debfuscationDataName());
        call.injectData(callData);
        call.call();
      }
 catch (      Exception e) {
        throw new RuntimeException(e);
      }
    }
    FMLRelaunchLog.fine("String_Node_Str",plugin.getClass().getSimpleName());
    String modContainer=plugin.getModContainerClass();
    if (modContainer != null) {
      FMLInjectionData.containers.add(modContainer);
    }
  }
  if (!deobfuscatedEnvironment) {
    classLoader.registerTransformer("String_Node_Str");
  }
  try {
    FMLRelaunchLog.fine("String_Node_Str");
    Class<?> loaderClazz=Class.forName("String_Node_Str",true,classLoader);
    Method m=loaderClazz.getMethod("String_Node_Str",Object[].class);
    m.invoke(null,(Object)FMLInjectionData.data());
    m=loaderClazz.getMethod("String_Node_Str");
    m.invoke(null);
    FMLRelaunchLog.fine("String_Node_Str");
  }
 catch (  Exception e) {
    System.out.println("String_Node_Str");
    throw new RuntimeException(e);
  }
}

Fixed version (ground truth):
public static void injectTransformers(LaunchClassLoader classLoader){
  for (  FMLPluginWrapper wrap : loadPlugins) {
    IFMLLoadingPlugin plug=wrap.coreModInstance;
    if (plug.getASMTransformerClass() != null) {
      for (      String xformClass : plug.getASMTransformerClass()) {
        FMLRelaunchLog.finest("String_Node_Str",xformClass);
        classLoader.registerTransformer(xformClass);
      }
    }
  }
  FMLRelaunchLog.fine("String_Node_Str");
  Map<String,Object> data=new HashMap<String,Object>();
  data.put("String_Node_Str",mcDir);
  data.put("String_Node_Str",loadPlugins);
  data.put("String_Node_Str",!deobfuscatedEnvironment);
  for (  FMLPluginWrapper pluginWrapper : loadPlugins) {
    IFMLLoadingPlugin plugin=pluginWrapper.coreModInstance;
    FMLRelaunchLog.fine("String_Node_Str",pluginWrapper.name);
    data.put("String_Node_Str",pluginWrapper.location);
    plugin.injectData(data);
    String setupClass=plugin.getSetupClass();
    if (setupClass != null) {
      try {
        IFMLCallHook call=(IFMLCallHook)Class.forName(setupClass,true,classLoader).newInstance();
        Map<String,Object> callData=new HashMap<String,Object>();
        callData.put("String_Node_Str",mcDir);
        callData.put("String_Node_Str",classLoader);
        callData.put("String_Node_Str",pluginWrapper.location);
        callData.put("String_Node_Str",FMLInjectionData.debfuscationDataName());
        call.injectData(callData);
        call.call();
      }
 catch (      Exception e) {
        throw new RuntimeException(e);
      }
    }
    FMLRelaunchLog.fine("String_Node_Str",plugin.getClass().getSimpleName());
    String modContainer=plugin.getModContainerClass();
    if (modContainer != null) {
      FMLInjectionData.containers.add(modContainer);
    }
  }
  Launch.blackboard.put("String_Node_Str",deobfuscatedEnvironment);
  tweaker.injectCascadingTweak("String_Node_Str");
}