java.lang.NullPointerException: Exception ticking world

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NPE when saving terminal

Exception ticking world

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Exception ticking world

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Exception ticking world

java.lang.NullPointerException: Exception ticking world	at dan200.computercraft.core.terminal.Terminal.writeToNBT(Terminal.java:314)	at dan200.computercraft.shared.common.ServerTerminal.writeDescription(ServerTerminal.java:96)	at dan200.computercraft.shared.peripheral.monitor.TileMonitor.writeDescription(TileMonitor.java:217)	at dan200.computercraft.shared.common.TileGeneric.func_145844_m(TileGeneric.java:192)	at net.minecraft.server.management.PlayerManager$PlayerInstance.func_151252_a(PlayerManager.java:571)	at net.minecraft.server.management.PlayerManager$PlayerInstance.func_73254_a(PlayerManager.java:518)	at net.minecraft.server.management.PlayerManager.func_72693_b(PlayerManager.java:64)	at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:223)	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:690)	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:344)	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:605)	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:481)	at java.lang.Thread.run(Thread.java:745)