ellipsisProjIssue.lean:1:18-1:22: error(lean.unknownIdentifier): Unknown identifier `succ`
{ lower := Nat.add,
  upper :=
    sorry } : Std.PRange { lower := Std.PRange.BoundShape.closed, upper := Std.PRange.BoundShape.open }
  (Nat → Nat → Nat)