Goal:
    x : t  y : t
  ============================
   (reflectProp (x = y) (eqb x y))


DEBUG:Going to execute:
subst *
Level 0: Backtrace:

Failed to progress.
Level 1: Backtrace:

Failed to progress.
Level 0: Backtrace:

Failed to progress.
Level 0: Backtrace:

Failed to progress.