score_genes_cell_cycle not running in Scanpy 1.1a1+15.g1570f7c

Hi, I tested the provided cell cycle notebook (with the data provided) in the following scanpy setup:

Running Scanpy 1.1a1+15.g1570f7c on 2018-05-18 16:30.
Dependencies: anndata==0.6.1+1.ga489245 numpy==1.13.1 scipy==0.19.1 pandas==0.21.0 scikit-learn==0.19.0 statsmodels==0.8.0 python-igraph==0.7.1 louvain==0.6.0+20.g3de109d

running the line sc.tl.score_genes_cell_cycle(adata, s_genes=s_genes, g2m_genes=g2m_genes)

results in

calculating cell cycle phase
computing score 'S_score'
--> could not add 
    'S_score', score of gene set (adata.obs)
computing score 'G2M_score'
--> could not add 
    'G2M_score', score of gene set (adata.obs)
---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
<ipython-input-9-5874179be677> in <module>()
----> 1 sc.tl.score_genes_cell_cycle(adata, s_genes=s_genes, g2m_genes=g2m_genes)

~/Documents/Python/scanpy/scanpy/tools/score_genes.py in score_genes_cell_cycle(adata, s_genes, g2m_genes, copy, **kwargs)
    170     # add g2m-score
    171     score_genes(adata, gene_list=g2m_genes, score_name='G2M_score', ctrl_size=ctrl_size, **kwargs)
--> 172     scores = adata.obs[['S_score', 'G2M_score']]
    173 
    174     # default phase is S

~/miniconda3/lib/python3.6/site-packages/pandas/core/frame.py in __getitem__(self, key)
   2131         if isinstance(key, (Series, np.ndarray, Index, list)):
   2132             # either boolean or fancy integer index
-> 2133             return self._getitem_array(key)
   2134         elif isinstance(key, DataFrame):
   2135             return self._getitem_frame(key)

~/miniconda3/lib/python3.6/site-packages/pandas/core/frame.py in _getitem_array(self, key)
   2175             return self._take(indexer, axis=0, convert=False)
   2176         else:
-> 2177             indexer = self.loc._convert_to_indexer(key, axis=1)
   2178             return self._take(indexer, axis=1, convert=True)
   2179 

~/miniconda3/lib/python3.6/site-packages/pandas/core/indexing.py in _convert_to_indexer(self, obj, axis, is_setter)
   1267                 if mask.any():
   1268                     raise KeyError('{mask} not in index'
-> 1269                                    .format(mask=objarr[mask]))
   1270 
   1271                 return _values_from_object(indexer)

KeyError: "['S_score' 'G2M_score'] not in index"

scverse / scanpy_usage

score_genes_cell_cycle not running in Scanpy 1.1a1+15.g1570f7c #4