O o1
Def. constructor #0
  O o2 = 2
Int constructor #1(2)
  O o3 = o2
Copy constructor #2( #1{2} )
  o1 = o3
Copy assignemnt #0{NULL} = #2{2}
  O o4 = func1()
  func1:
    O o(10)
Int constructor #3(10)
    return o
Move constructor #4( #3{10} )
Destructor of #3{NULL}
  O o5 = 5
Int constructor #5(5)
  o5 = func1()
  func1:
    O o(10)
Int constructor #6(10)
    return o
Move constructor #7( #6{10} )
Destructor of #6{NULL}
Move assignemnt #5{5} = #7{10}
Destructor of #7{NULL}
  func2(o5)
Copy constructor #8( #5{10} )
  func2:
Destructor of #8{10}
  func2b(o5)
  func2b:
  exit
Destructor of #5{10}
Destructor of #4{10}
Destructor of #2{2}
Destructor of #1{2}
Destructor of #0{2}