The router could panic with a 'slice bounds out of range' error when handling requests that trigger its backtracking logic.
The root cause was a shallow copy of the node's `children` slice when creating a `skippedNode` for backtracking. This could lead to a corrupted state if the router needed to backtrack and then proceed down a wildcard path.
This commit fixes the issue by introducing a `copyChildren` method on the `node` struct, which creates a safe copy of the children slice. This method is now used when creating a `skippedNode`, ensuring that the backtracking logic is isolated and robust.