TypeConstructorsWhichPreserveGuardedness4.err

Termination checking failed for the following functions:
  D
Problematic calls:
  .TypeConstructorsWhichPreserveGuardedness4.♯-0
    (at TypeConstructorsWhichPreserveGuardedness4.agda:11,10-11)
  D (at TypeConstructorsWhichPreserveGuardedness4.agda:11,13-14)