stacktrace

[ghost]

[ERRR:20/03/01 8:45] IndexOutOfBoundsException: Index: 16, Size: 15
   java.util.ArrayList.rangeCheckForAdd(Unknown Source)
   java.util.ArrayList.add(Unknown Source)
   com.sun.javafx.collections.ObservableListWrapper.doAdd(ObservableListWrapper.java:101)
   javafx.collections.ModifiableObservableListBase.add(ModifiableObservableListBase.java:151)
   me.coley.jremapper.ui.FilePane$FileTreeItem.addOrdered(FilePane.java:312)
   me.coley.jremapper.ui.FilePane$FileTreeItem.addFile(FilePane.java:287)
   me.coley.jremapper.ui.FilePane.addToRoot(FilePane.java:235)
   me.coley.jremapper.ui.FilePane.onMappingUpdate(FilePane.java:176)
   sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
   sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
   java.lang.reflect.Method.invoke(Unknown Source)
   me.coley.event.Bus$Handler$InvokeWrapper.post(Bus.java:189)
   me.coley.event.Bus$Handler.lambda$post$1(Bus.java:167)
   java.util.stream.ForEachOps$ForEachOp$OfRef.accept(Unknown Source)
   java.util.stream.SortedOps$SizedRefSortingSink.end(Unknown Source)
   java.util.stream.AbstractPipeline.copyInto(Unknown Source)