Failed to solve the following constraints:
  _g_26 tt = tt : _P_25 tt (blocked on _g_26)
  ext (record { P = _P_25 ; g = _g_26 }) tt = ext a tt tt : _P_25 tt
    (blocked on _28)
  _P_25 tt = ⊤ : Set (blocked on _P_25)
Unsolved metas at the following locations:
  Issue878.agda:30,7-10
  Issue878.agda:30,7-13
