(4 &F) (3 &F1 (C)) (2 &F3 (A) (B) (C)) (1 &Main)
(5 &RF_Stack (0) (0)) (4 &F) (3 &F1 (C)) (2 &F3 (A) (B) (C)) (1 &Main)
(5 &RF_Stack (0) (4)) (4 &F) (3 &F1 (C)) (2 &F3 (A) (B) (C))
(4 &F) (3 &F1 (C)) (2 &F3 (A) (B) (C)) (1 &Main)
Catched: F "Unexpected fail"