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Fixed a crash occuring when you have a Tree structure instantiated but never constructed, the destructor would then try to halt all actions but since
root_node
has never been initialized, it would just segfault.edit: Didn't notice you used aggregate for the Tree struct, any reason you did that ? I first thought it was for some sort of C compatilibity but since the rest of the library does not use POD-classes, I guess it's not the reason