at forestry.core.genetics.Chromosome.writeToNBT(Chromosome.java:50)
at forestry.core.genetics.Genome.writeToNBT(Genome.java:58)
at forestry.arboriculture.genetics.Tree.writeToNBT(Tree.java:75)
at forestry.arboriculture.genetics.Tree.copy(Tree.java:326)
at forestry.arboriculture.genetics.TreeHelper.plantSapling(TreeHelper.java:93)
at forestry.arboriculture.items.ItemGermlingGE.a(ItemGermlingGE.java:148)