IndexError for N-dimensional real FFT

[vtavana]

Following example returns an error

import mkl_fft.interfaces as mfi, numpy
b=numpy.arange(24.).reshape(2, 3, 4)
mfi.numpy_fft.rfft2(b, axes=(1, 2), norm="forward").shape
# ...
# IndexError: list index out of range

while stock NumPy works correctly

import numpy
b=numpy.arange(24.).reshape(2, 3, 4)
numpy.fft.rfft2(b, axes=(1, 2), norm="forward").shape
# (2, 3, 3)

For the same example, there is no issue, if norm is None or "backward".

[vtavana]

A similar error happens in scipy interafce

import mkl_fft.interfaces as mfi, numpy
b=numpy.arange(24.).reshape(2, 3, 4)
mfi.scipy_fft.rfft2(b, axes=(1, 2), norm="forward").shape
# ...
# IndexError: list index out of range