protected.lean:10:7: error: unknown identifier 'x'
(sorryAx ?m.23) : ?m.23
Foo.x : Nat
Bla.Foo.y : Nat
protected.lean:22:7: error: unknown identifier 'y'
(sorryAx ?m.67) : ?m.67
Bla.Foo.z : Nat
protected.lean:25:14: error: protected declarations must be in a namespace
protected.lean:28:14: error: unknown identifier 'f'
with resulting expansion
  HasMul.mul._@._internal._hyg.0 f (x-1) 2 
while expanding
  f (x-1) * 2 
while expanding
  if x > 0 then f (x-1) * 2 else 1 
while expanding
  protected partial def Foo.f (x : Nat) :=
  if x > 0 then f (x-1) * 2 else 1 
8
protected.lean:38:14: error: unknown identifier 'g'
with resulting expansion
  HasMul.mul._@._internal._hyg.0 g (x-1) 2 
while expanding
  g (x-1) * 2 
while expanding
  if x > 0 then g (x-1) * 2 else 1 
protected.lean:47:6: error: unknown identifier 'g'
protected.lean:47:0: error: application type mismatch
  Lean.runEval (sorryAx ?m.781)
argument
  (sorryAx ?m.781)
has type
  ?m.781
but is expected to have type
  ?m.783
8