[1 of 2] Compiling T11970A1         ( T11970A1.hs, T11970A1.o )
[2 of 2] Compiling T11970A          ( T11970A.hs, T11970A.o )

T11970A.hs:3:1: warning: [-Wunused-imports (in -Wextra)]
    The import of ‘Fail(b)’ from module ‘T11970A1’ is redundant