Goal:
    A : Type  B : Type  R : nat → A → B → Type  n : nat  H : True
  ============================
   (All2i_nil = All2i_nil)


DEBUG:Going to execute:
DepElim.depelim id
DEBUG LTAC Evaluated term: H
DEBUG LTAC Evaluated term: True
Level 6: type of H
 has value 
True

Level 6: Backtrace:

No matching clauses for match.
Level 5: Backtrace:

No matching clauses for match.
Level 5: evaluation
raised the exception
Backtrace:

No matching clauses for match.

Level 5: Backtrace:

No matching clauses for match.
Level 4: Backtrace:

No matching clauses for match.