DrawMorganBit errors when useSVG is False

[ncfirth]

I had a check and couldn't see any that matched this, but very sorry if it is a duplicate. I'm seeing an error that only pops up when I use useSVG=False in Chem.Draw.DrawMorganBit.

from rdkit import Chem
from rdkit.Chem import rdMolDescriptors

mol = Chem.MolFromSmiles('COC(COc1cncc2nnc(-c3ccc(C#N)cc3)n12)c1ccc(F)c(F)c1')

bi = {}
fp = rdMolDescriptors.GetMorganFingerprintAsBitVect(
    mol, 
    radius=2, 
    bitInfo=bi, 
    nBits=128
)
Chem.Draw.DrawMorganBit(mol, 107, bi, useSVG=True)

Chem.Draw.DrawMorganBit(mol, 107, bi, useSVG=False)
RDKit ERROR: [11:00:26] non-ring atom 1 marked aromatic
---------------------------------------------------------------------------
AtomKekulizeException                     Traceback (most recent call last)
<ipython-input-3-1c8e096ed296> in <module>
----> 1 Chem.Draw.DrawMorganBit(mol, 107, bi, useSVG=False)

~/anaconda3/envs/chem/lib/python3.7/site-packages/rdkit/Chem/Draw/IPythonConsole.py in DrawMorganBit(mol, bitId, bitInfo, drawOptions, **kwargs)
    239   else:
    240     fn = Draw.DrawMorganBit
--> 241   return _DrawBit(fn, mol, bitId, bitInfo, drawOptions=drawOptions, **kwargs)
    242 
    243 

~/anaconda3/envs/chem/lib/python3.7/site-packages/rdkit/Chem/Draw/IPythonConsole.py in _DrawBit(fn, *args, **kwargs)
    211   if 'useSVG' not in kwargs:
    212     kwargs['useSVG'] = ipython_useSVG
--> 213   res = fn(*args, **kwargs)
    214   if kwargs['useSVG']:
    215     return SVG(res)

~/anaconda3/envs/chem/lib/python3.7/site-packages/rdkit/Chem/Draw/__init__.py in DrawMorganBit(mol, bitId, bitInfo, whichExample, **kwargs)
    659 def DrawMorganBit(mol, bitId, bitInfo, whichExample=0, **kwargs):
    660   atomId, radius = bitInfo[bitId][whichExample]
--> 661   return DrawMorganEnv(mol, atomId, radius, **kwargs)
    662 
    663 

~/anaconda3/envs/chem/lib/python3.7/site-packages/rdkit/Chem/Draw/__init__.py in DrawMorganEnv(mol, atomId, radius, molSize, baseRad, useSVG, aromaticColor, ringColor, centerColor, extraColor, drawOptions, **kwargs)
    825                       highlightAtomColors=menv.atomColors, highlightBonds=menv.highlightBonds,
    826                       highlightBondColors=menv.bondColors, highlightAtomRadii=menv.highlightRadii,
--> 827                       **kwargs)
    828   drawer.FinishDrawing()
    829   return drawer.GetDrawingText()

AtomKekulizeException: non-ring atom 1 marked aromatic

• RDKit version: 2020.09.1
• OS: Ubuntu 20.04.1 LTS
• Python version: 3.7.9
• Are you using conda? yes
• If you are using conda, which channel did you install the rdkit from? rdkit

[greglandrum]

This is almost certainly connected with #3543, so if you update to 2020.09.3 or newer it should go away.
I'm going to leave this open though, because we shouldn't even be trying to save PNG metadata in cases like this.

[LiuCMU]

I see that you used rdMolDescriptors.GetMorganFingerprintAsBitVect. Is this the same as AllChem.GetMorganFingerprintAsBitVect? Thanks!