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Both overloads swapped the underlying container storage but never called set_parents(), leaving elements moved into *this with stale m_parent pointers (typically nullptr from the free-standing array_t/object_t). This produced wrong JSON Pointer paths in diagnostic messages and could trip assert_invariant() on subsequent copies. Mirrors the fix already applied in swap(reference other). Signed-off-by: Niels Lohmann <mail@nlohmann.me>