Goal:
    hd : A.t  tl : t  X : lt_ tl tl  IHX : False
  ============================
   (let H := CoreTactics.block in let H0 := CoreTactics.block in False)


DEBUG:Going to execute:
match goal with
           | hyp:context [ CoreTactics.block ]
             |- _ =>
                 cbn beta in hyp; eqns_specialize_eqs_block hyp;
                  cbn[eq_rect_r eq_rect] in hyp
           end

Goals:
    hd : A.t  tl : list A.t  H : A.lt hd hd
  ============================
   (let H := CoreTactics.block in let H0 := CoreTactics.block in False)

    hd : A.t  tl : t  X : lt_ tl tl  IHX : False
  ============================
   (let H := CoreTactics.block in let H0 := CoreTactics.block in False)


DEBUG:Going to execute:
DepElim.unblock_dep_elim
Level 0: Backtrace:

No matching clauses for match.

Goals:
    hd : A.t  tl : list A.t  H : A.lt hd hd
  ============================
   (let H := CoreTactics.block in let H0 := CoreTactics.block in False)

    hd : A.t  tl : t  X : lt_ tl tl  IHX : False
  ============================
   (let H := CoreTactics.block in let H0 := CoreTactics.block in False)


DEBUG:Going to execute:
match goal with
           | |- let _ := CoreTactics.block in ?T =>
                 match T with
                 | context [ CoreTactics.block ] =>
                     change T; CoreTactics.intros_until_block
                 end
           | _ => CoreTactics.unblock_goal
           end