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Diffstat (limited to 'numpy/lib/arraysetops.py')
| -rw-r--r-- | numpy/lib/arraysetops.py | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/numpy/lib/arraysetops.py b/numpy/lib/arraysetops.py index 7600e17be..bd56b6975 100644 --- a/numpy/lib/arraysetops.py +++ b/numpy/lib/arraysetops.py @@ -339,7 +339,9 @@ def _unique1d(ar, return_index=False, return_inverse=False, aux_firstnan = np.searchsorted(np.isnan(aux), True, side='left') else: aux_firstnan = np.searchsorted(aux, aux[-1], side='left') - mask[1:aux_firstnan] = (aux[1:aux_firstnan] != aux[:aux_firstnan - 1]) + if aux_firstnan > 0: + mask[1:aux_firstnan] = ( + aux[1:aux_firstnan] != aux[:aux_firstnan - 1]) mask[aux_firstnan] = True mask[aux_firstnan + 1:] = False else: |