Program: 27563
Project: 27563
Buggy source:
/** 
 * @author Zidane - June 2nd, 2016
 * @reason Forge's initDimension is very different from Sponge's multi-world. We basically rig it into our system so mods work.
 * @param dim The dimension to load
 */
@Overwrite public static void initDimension(int dim){
  if (WorldManager.getWorldByDimensionId(dim).isPresent()) {
    return;
  }
  if (dim == 0) {
    throw new RuntimeException("String_Node_Str");
  }
  WorldManager.getWorldByDimensionId(0).orElseThrow(() -> new RuntimeException("String_Node_Str" + "String_Node_Str"));
  DimensionType dimensionType=WorldManager.getDimensionType(dim).orElse(null);
  if (dimensionType == null) {
    SpongeImpl.getLogger().warn("String_Node_Str" + "String_Node_Str",dim);
    return;
  }
  final WorldProvider provider=dimensionType.createDimension();
  provider.setDimension(dim);
  String worldFolder=WorldManager.getWorldFolderByDimensionId(dim).orElse(provider.getSaveFolder());
  WorldProperties properties=WorldManager.getWorldProperties(worldFolder).orElse(null);
  if (properties == null) {
    final WorldArchetype.Builder builder=WorldArchetype.builder().dimension((org.spongepowered.api.world.DimensionType)(Object)dimensionType).keepsSpawnLoaded(dimensionType.shouldLoadSpawn());
    String modId=StaticMixinForgeHelper.getModIdFromClass(provider.getClass());
    final WorldArchetype archetype=builder.build(modId + "String_Node_Str" + dimensionType.getName().toLowerCase(),dimensionType.getName());
    properties=WorldManager.createWorldProperties(worldFolder,archetype);
    ((IMixinWorldInfo)properties).setDimensionId(dim);
  }
  if (!properties.isEnabled()) {
    SpongeImpl.getLogger().warn("String_Node_Str",worldFolder,dim);
    return;
  }
  Optional<WorldServer> optWorld=WorldManager.loadWorld(properties);
  if (!optWorld.isPresent()) {
    SpongeImpl.getLogger().error("String_Node_Str",properties.getWorldName());
  }
}

Fixed version (ground truth):
/** 
 * @author Zidane - June 2nd, 2016
 * @reason Forge's initDimension is very different from Sponge's multi-world. We basically rig it into our system so mods work.
 * @param dim The dimension to load
 */
@Overwrite public static void initDimension(int dim){
  if (WorldManager.getWorldByDimensionId(dim).isPresent()) {
    return;
  }
  if (dim == 0) {
    throw new RuntimeException("String_Node_Str");
  }
  WorldManager.getWorldByDimensionId(0).orElseThrow(() -> new RuntimeException("String_Node_Str" + "String_Node_Str"));
  DimensionType dimensionType=WorldManager.getDimensionType(dim).orElse(null);
  if (dimensionType == null) {
    SpongeImpl.getLogger().warn("String_Node_Str" + "String_Node_Str",dim);
    return;
  }
  final WorldProvider provider=dimensionType.createDimension();
  provider.setDimension(dim);
  String worldFolder=WorldManager.getWorldFolderByDimensionId(dim).orElse(provider.getSaveFolder());
  WorldProperties properties=WorldManager.getWorldProperties(worldFolder).orElse(null);
  if (properties == null) {
    String modId=StaticMixinForgeHelper.getModIdFromClass(provider.getClass());
    WorldArchetype archetype=Sponge.getRegistry().getType(WorldArchetype.class,modId + "String_Node_Str" + dimensionType.getName().toLowerCase()).orElse(null);
    if (archetype == null) {
      final WorldArchetype.Builder builder=WorldArchetype.builder().dimension((org.spongepowered.api.world.DimensionType)(Object)dimensionType).keepsSpawnLoaded(dimensionType.shouldLoadSpawn());
      archetype=builder.build(modId + "String_Node_Str" + dimensionType.getName().toLowerCase(),dimensionType.getName());
    }
    IMixinWorldSettings worldSettings=(IMixinWorldSettings)archetype;
    worldSettings.setDimensionType((org.spongepowered.api.world.DimensionType)(Object)dimensionType);
    worldSettings.setLoadOnStartup(false);
    properties=WorldManager.createWorldProperties(worldFolder,archetype,dim);
    ((IMixinWorldInfo)properties).setDimensionId(dim);
    ((IMixinWorldInfo)properties).setIsMod(true);
  }
  if (!properties.isEnabled()) {
    SpongeImpl.getLogger().warn("String_Node_Str",worldFolder,dim);
    return;
  }
  Optional<WorldServer> optWorld=WorldManager.loadWorld(properties);
  if (!optWorld.isPresent()) {
    SpongeImpl.getLogger().error("String_Node_Str",properties.getWorldName());
  }
}