[1 of 5] Processing h
  [1 of 1] Compiling H[sig]           ( h/H.hsig, nothing )
[2 of 5] Processing t-impl
  Instantiating t-impl
  [1 of 1] Compiling T                ( t-impl/T.hs, bkpfail05.out/t-impl/T.o )
[3 of 5] Processing p
  [1 of 1] Compiling H[sig]           ( p/H.hsig, nothing )
[4 of 5] Processing h-impl
  Instantiating h-impl
  [1 of 1] Including t-impl
  [1 of 1] Compiling H                ( h-impl/H.hs, bkpfail05.out/h-impl/H.o )
[5 of 5] Processing q
  Instantiating q
  [1 of 1] Including p[H=h-impl:H]
    Instantiating p[H=h-impl:H]
    [1 of 2] Including h[H=h-impl:H]
      Instantiating h[H=h-impl:H]
      [1 of 1] Compiling H[sig]           ( h/H.hsig, bkpfail05.out/h/h-5FYQgnNkfSvBT5yogOxPpf/H.o )

bkpfail05.out/h/h-5FYQgnNkfSvBT5yogOxPpf/../H.hi:1:1: error:
    • ‘T1’ is exported by the hsig file, but not exported by the implementing module ‘h-impl:H’
    • while checking that h-impl:H implements signature H in h[H=h-impl:H]