Program: 30495
Project: 30495
Buggy source:
@Override public CableBusRenderState getRenderState(){
  PartCable cable=(PartCable)getCenter();
  CableBusRenderState renderState=new CableBusRenderState();
  if (cable != null) {
    renderState.setCableColor(cable.getCableColor());
    renderState.setCableType(cable.getCableConnectionType());
    renderState.setCoreType(cable.getCableConnectionType().getCoreType());
    for (    EnumFacing facing : EnumFacing.values()) {
      if (!cable.isConnected(facing)) {
        continue;
      }
      AECableType connectionType=cable.getCableConnectionType();
      BlockPos adjacentPos=this.getTile().getPos().offset(facing);
      TileEntity adjacentTe=this.getTile().getWorld().getTileEntity(adjacentPos);
      if (adjacentTe instanceof IGridHost) {
        if (!(adjacentTe instanceof IPartHost) || cable.getCableConnectionType() == AECableType.DENSE) {
          IGridHost gridHost=(IGridHost)adjacentTe;
          connectionType=gridHost.getCableConnectionType(AEPartLocation.fromFacing(facing.getOpposite()));
        }
      }
      if (adjacentTe instanceof IPartHost) {
        renderState.getCableBusAdjacent().add(facing);
      }
      renderState.getConnectionTypes().put(facing,connectionType);
    }
    for (    EnumFacing facing : EnumFacing.values()) {
      int channels=cable.getChannelsOnSide(facing);
      renderState.getChannelsOnSide().put(facing,channels);
    }
  }
  for (  EnumFacing facing : EnumFacing.values()) {
    IPart part=getPart(facing);
    if (part == null) {
      continue;
    }
    if (part instanceof IGridHost) {
      IGridHost gridHost=(IGridHost)part;
      AECableType desiredType=gridHost.getCableConnectionType(AEPartLocation.INTERNAL);
      if (renderState.getCoreType() == CableCoreType.GLASS && (desiredType == AECableType.SMART || desiredType == AECableType.COVERED)) {
        renderState.setCoreType(CableCoreType.COVERED);
      }
      int length=(int)part.getCableConnectionLength(null);
      if (length > 0 && length <= 8) {
        renderState.getAttachmentConnections().put(facing,length);
      }
    }
    renderState.getAttachments().put(facing,part.getStaticModels());
  }
  return renderState;
}

Fixed version (ground truth):
@Override public CableBusRenderState getRenderState(){
  PartCable cable=(PartCable)getCenter();
  CableBusRenderState renderState=new CableBusRenderState();
  if (cable != null) {
    renderState.setCableColor(cable.getCableColor());
    renderState.setCableType(cable.getCableConnectionType());
    renderState.setCoreType(CableCoreType.fromCableType(cable.getCableConnectionType()));
    for (    EnumFacing facing : EnumFacing.values()) {
      if (!cable.isConnected(facing)) {
        continue;
      }
      AECableType connectionType=cable.getCableConnectionType();
      BlockPos adjacentPos=this.getTile().getPos().offset(facing);
      TileEntity adjacentTe=this.getTile().getWorld().getTileEntity(adjacentPos);
      if (adjacentTe instanceof IGridHost) {
        if (!(adjacentTe instanceof IPartHost) || cable.getCableConnectionType() == AECableType.DENSE) {
          IGridHost gridHost=(IGridHost)adjacentTe;
          connectionType=gridHost.getCableConnectionType(AEPartLocation.fromFacing(facing.getOpposite()));
        }
      }
      if (adjacentTe instanceof IPartHost) {
        renderState.getCableBusAdjacent().add(facing);
      }
      renderState.getConnectionTypes().put(facing,connectionType);
    }
    for (    EnumFacing facing : EnumFacing.values()) {
      int channels=cable.getChannelsOnSide(facing);
      renderState.getChannelsOnSide().put(facing,channels);
    }
  }
  for (  EnumFacing facing : EnumFacing.values()) {
    IPart part=getPart(facing);
    if (part == null) {
      continue;
    }
    if (part instanceof IGridHost) {
      IGridHost gridHost=(IGridHost)part;
      AECableType desiredType=gridHost.getCableConnectionType(AEPartLocation.INTERNAL);
      if (renderState.getCoreType() == CableCoreType.GLASS && (desiredType == AECableType.SMART || desiredType == AECableType.COVERED)) {
        renderState.setCoreType(CableCoreType.COVERED);
      }
      int length=(int)part.getCableConnectionLength(null);
      if (length > 0 && length <= 8) {
        renderState.getAttachmentConnections().put(facing,length);
      }
    }
    renderState.getAttachments().put(facing,part.getStaticModels());
  }
  return renderState;
}