cyclic_default_fields.lean:6:8: error: Failed to insert value for 'Eq.eq', it depends on field(s) 'ne', but the value for these fields is not available.
Unfolded type/default value:

  λ (a b : ℕ), ¬?ne a b

Failed to insert value for 'Eq.ne', it depends on field(s) 'eq', but the value for these fields is not available.
Unfolded type/default value:

  λ (a b : ℕ), ¬?eq a b
⁇ : Eq ℕ
{eq := eq ℕ, ne := λ (a b : ℕ), ¬a = b} : Eq ℕ
{eq := λ (a b : ℕ), ¬a ≠ b, ne := ne ℕ} : Eq ℕ