∀ (mvarId : Lean.MVarId) (elems diseqs : Array Lean.FVarId) (subst : Lean.Meta.FVarSubst) (mvarId_1 : Lean.MVarId)
  (elems_1 diseqs_1 : Array Lean.FVarId) (subst_1 : Lean.Meta.FVarSubst),
  ({ mvarId := mvarId, elems := elems, diseqs := diseqs, subst := subst } =
      { mvarId := mvarId_1, elems := elems_1, diseqs := diseqs_1, subst := subst_1 }) =
    (mvarId = mvarId_1 ∧ elems = elems_1 ∧ diseqs = diseqs_1 ∧ subst = subst_1)