Goal:
  
  hd' : A.t
  tl'0 : t
  hd : A.t
  tl : list A.t
  tl' : list A.t
  H : A.lt hd hd'
  H' : lt_ tl' tl'0
  ============================
   (let H := CoreTactics.block in
    let H0 := CoreTactics.block in lt (hd :: tl) (hd' :: tl'0))


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
Level 0: Backtrace:

No matching clauses for match.

Goals:
  
  hd'0 : A.t
  tl'0 : list A.t
  hd : A.t
  tl : list A.t
  hd' : A.t
  tl' : list A.t
  H : A.lt hd hd'
  H0 : A.lt hd' hd'0
  ============================
   (let H := CoreTactics.block in
    let H0 := CoreTactics.block in lt (hd :: tl) (hd'0 :: tl'0))

  
  hd' : A.t
  tl'0 : t
  hd : A.t
  tl : list A.t
  tl' : list A.t
  H : A.lt hd hd'
  H' : lt_ tl' tl'0
  ============================
   (let H := CoreTactics.block in
    let H0 := CoreTactics.block in lt (hd :: tl) (hd' :: tl'0))


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

No matching clauses for match.

Goals:
  
  hd'0 : A.t
  tl'0 : list A.t
  hd : A.t
  tl : list A.t
  hd' : A.t
  tl' : list A.t
  H : A.lt hd hd'
  H0 : A.lt hd' hd'0
  ============================
   (let H := CoreTactics.block in
    let H0 := CoreTactics.block in lt (hd :: tl) (hd'0 :: tl'0))

  
  hd' : A.t
  tl'0 : t
  hd : A.t
  tl : list A.t
  tl' : list A.t
  H : A.lt hd hd'
  H' : lt_ tl' tl'0
  ============================
   (let H := CoreTactics.block in
    let H0 := CoreTactics.block in lt (hd :: tl) (hd' :: tl'0))


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