Program: 51784
Project: 51784
Buggy source:
/** 
 * The primary loading code This is visited during first initialization by Minecraft to scan and load the mods from all sources 1. The minecraft jar itself (for loading of in jar mods- I would like to remove this if possible but forge depends on it at present) 2. The mods directory with expanded subdirs, searching for mods named mod_*.class 3. The mods directory for zip and jar files, searching for mod classes named mod_*.class again The found resources are first loaded into the   {@link #modClassLoader}(always) then scanned for class resources matching the specification above. If they provide the   {@link Mod} annotation, they will be loaded as"FML mods", which currently is effectively a NO-OP. If they are determined to be  {@link BaseModProxy} subclasses they are loaded as such.Finally, if they are successfully loaded as classes, they are then added to the available mod list.
 */
private ModDiscoverer identifyMods(){
  FMLLog.fine("String_Node_Str",injectedContainers);
  mods.add(new InjectedModContainer(mcp,null));
  File coremod=new File(minecraftDir,"String_Node_Str");
  for (  String cont : injectedContainers) {
    ModContainer mc;
    try {
      mc=(ModContainer)Class.forName(cont,true,modClassLoader).newInstance();
    }
 catch (    Exception e) {
      FMLLog.log(Level.SEVERE,e,"String_Node_Str",cont);
      throw new LoaderException(e);
    }
    mods.add(new InjectedModContainer(mc,coremod));
  }
  ModDiscoverer discoverer=new ModDiscoverer();
  FMLLog.fine("String_Node_Str");
  discoverer.findClasspathMods(modClassLoader);
  FMLLog.fine("String_Node_Str");
  FMLLog.info("String_Node_Str",canonicalModsDir.getAbsolutePath());
  discoverer.findModDirMods(canonicalModsDir);
  mods.addAll(discoverer.identifyMods());
  identifyDuplicates(mods);
  namedMods=Maps.uniqueIndex(mods,new ModIdFunction());
  FMLLog.info("String_Node_Str",mods.size(),mods.size() != 1 ? "String_Node_Str" : "String_Node_Str");
  return discoverer;
}

Fixed version (ground truth):
/** 
 * The primary loading code This is visited during first initialization by Minecraft to scan and load the mods from all sources 1. The minecraft jar itself (for loading of in jar mods- I would like to remove this if possible but forge depends on it at present) 2. The mods directory with expanded subdirs, searching for mods named mod_*.class 3. The mods directory for zip and jar files, searching for mod classes named mod_*.class again The found resources are first loaded into the   {@link #modClassLoader}(always) then scanned for class resources matching the specification above. If they provide the   {@link Mod} annotation, they will be loaded as"FML mods", which currently is effectively a NO-OP. If they are determined to be  {@link BaseModProxy} subclasses they are loaded as such.Finally, if they are successfully loaded as classes, they are then added to the available mod list.
 */
private ModDiscoverer identifyMods(){
  FMLLog.fine("String_Node_Str",injectedContainers);
  mods.add(new InjectedModContainer(mcp,new File("String_Node_Str")));
  File coremod=new File(minecraftDir,"String_Node_Str");
  for (  String cont : injectedContainers) {
    ModContainer mc;
    try {
      mc=(ModContainer)Class.forName(cont,true,modClassLoader).newInstance();
    }
 catch (    Exception e) {
      FMLLog.log(Level.SEVERE,e,"String_Node_Str",cont);
      throw new LoaderException(e);
    }
    mods.add(new InjectedModContainer(mc,coremod));
  }
  ModDiscoverer discoverer=new ModDiscoverer();
  FMLLog.fine("String_Node_Str");
  discoverer.findClasspathMods(modClassLoader);
  FMLLog.fine("String_Node_Str");
  FMLLog.info("String_Node_Str",canonicalModsDir.getAbsolutePath());
  discoverer.findModDirMods(canonicalModsDir);
  mods.addAll(discoverer.identifyMods());
  identifyDuplicates(mods);
  namedMods=Maps.uniqueIndex(mods,new ModIdFunction());
  FMLLog.info("String_Node_Str",mods.size(),mods.size() != 1 ? "String_Node_Str" : "String_Node_Str");
  return discoverer;
}