Crash when opening mechanic furnace or crusher

[madelfagam]

This mod probably hasn't been maintained for a while, but I've been experiencing a persistent crash. It can be resolved by breaking and replacing the blocks, but that's only a temporary solution, it all happens again later.

[Client thread/ERROR] [FML]: OpenGuiHandler exception
java.lang.NullPointerException: Cannot invoke "net.minecraft.inventory.InventoryBasic.func_70302_i_()" because "this.tileEntity.input" is null
at Launch//com.creativemd.randomadditions.common.systems.machine.SubContainerMachine.createControls(SubContainerMachine.java:36) ~[SubContainerMachine.class:?]
at Launch//com.creativemd.creativecore.common.container.SubContainer.initContainer(SubContainer.java:117) ~[SubContainer.class:?]
at Launch//com.creativemd.creativecore.common.container.ContainerSub.(ContainerSub.java:36) ~[ContainerSub.class:?]
at Launch//com.creativemd.creativecore.common.gui.GuiContainerSub.(GuiContainerSub.java:33) ~[GuiContainerSub.class:?]
at Launch//com.creativemd.creativecore.common.gui.GuiHandler.getClientGuiElement(GuiHandler.java:95) ~[GuiHandler.class:?]