Program: 32912
Project: 32912
Buggy source:
/** 
 * May download the skin if its not in the cache, can be passed a SkinManager#SkinAvailableCallback for handling
 */
public ResourceLocation loadSkin(final MinecraftProfileTexture profileTexture,final Type p_152789_2_,final SkinManager.SkinAvailableCallback skinAvailableCallback){
  customskinloader.utils.HttpTextureUtil.HttpTextureInfo info=customskinloader.utils.HttpTextureUtil.toHttpTextureInfo(this.skinCacheDir,profileTexture.getUrl());
  final ResourceLocation var4=new ResourceLocation("String_Node_Str" + info.hash);
  ITextureObject var5=this.textureManager.getTexture(var4);
  if (var5 != null) {
    if (skinAvailableCallback != null) {
      skinAvailableCallback.skinAvailable(p_152789_2_,var4,profileTexture);
    }
  }
 else {
    final ImageBufferDownload var8=p_152789_2_ == Type.SKIN ? new ImageBufferDownload() : null;
    ThreadDownloadImageData var9=new ThreadDownloadImageData(info.cacheFile,info.url,DefaultPlayerSkin.getDefaultSkinLegacy(),new IImageBuffer(){
      private static final String __OBFID="String_Node_Str";
      public BufferedImage parseUserSkin(      BufferedImage image){
        if (var8 != null) {
          image=var8.parseUserSkin(image);
        }
        return image;
      }
      public void skinAvailable(){
        if (var8 != null) {
          var8.skinAvailable();
        }
        if (skinAvailableCallback != null) {
          skinAvailableCallback.skinAvailable(p_152789_2_,var4,profileTexture);
        }
      }
    }
);
    this.textureManager.loadTexture(var4,var9);
  }
  return var4;
}

Fixed version (ground truth):
/** 
 * May download the skin if its not in the cache, can be passed a SkinManager#SkinAvailableCallback for handling
 */
public ResourceLocation loadSkin(final MinecraftProfileTexture profileTexture,final Type p_152789_2_,final SkinManager.SkinAvailableCallback skinAvailableCallback){
  customskinloader.utils.HttpTextureUtil.HttpTextureInfo info=customskinloader.utils.HttpTextureUtil.toHttpTextureInfo(this.skinCacheDir,profileTexture.getUrl());
  final ResourceLocation var4=new ResourceLocation("String_Node_Str" + info.hash);
  ITextureObject var5=this.textureManager.getTexture(var4);
  if (var5 != null) {
    if (skinAvailableCallback != null) {
      skinAvailableCallback.skinAvailable(p_152789_2_,var4,profileTexture);
    }
  }
 else {
    final ImageBufferDownload var8=p_152789_2_ == Type.SKIN ? new customskinloader.renderer.SkinBuffer() : null;
    ThreadDownloadImageData var9=new ThreadDownloadImageData(info.cacheFile,info.url,DefaultPlayerSkin.getDefaultSkinLegacy(),new IImageBuffer(){
      private static final String __OBFID="String_Node_Str";
      public BufferedImage parseUserSkin(      BufferedImage image){
        if (var8 != null) {
          image=var8.parseUserSkin(image);
        }
        return image;
      }
      public void skinAvailable(){
        if (var8 != null) {
          var8.skinAvailable();
        }
        if (skinAvailableCallback != null) {
          skinAvailableCallback.skinAvailable(p_152789_2_,var4,profileTexture);
        }
      }
    }
);
    this.textureManager.loadTexture(var4,var9);
  }
  return var4;
}