Hidden circular reference in angular removed on undo

[Madd0g]

I have a tree-structure where I want to use undo/redo. Every leaf in the tree is shown by a directive, at runtime (when the directive starts), I assign a non-enumerable property to the leaf that points to its parent in the tree.

I use Object.defineProperty and set it to enumerable: false. All is good until I try to undo something in the tree and all the hidden attributes disappear from all the leaves.

If I define it as a non-hidden property, angular goes crazy with RangeError: Maximum call stack size exceeded.

Is there a way to work around this and have non-enumerable properties in objects watched by chronicle?

Thanks!