rwWithSynthesizeBug.lean:36:18-39:15: error: unsolved goals
inst : Bar Nat := @Bar.mk Nat (@OfNat.ofNat Nat 0 (instOfNatNat 0))
h : @w Nat (@f Nat inst (@OfNat.ofNat Nat 5 (instOfNatNat 5)))
⊢ True