nodebook throws a KeyError when an Exception is caught and bound to a variable

[neon-ninja]

In a nodebook enabled notebook, the cell:

try:
    1/0
except Exception as e:
    print(e)

throws the following Exception, instead of catching the the ZeroDivisionError:

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
<ipython-input-2-5f477361abed> in <module>
----> 1 get_ipython().run_cell_magic('execute_cell', ' 0683b3b36079448da8789b4c92d28340', 'try:\n    1/0\nexcept Exception as e:\n    print(e)\n')

/usr/local/lib/python3.8/dist-packages/IPython/core/interactiveshell.py in run_cell_magic(self, magic_name, line, cell)
   2401             with self.builtin_trap:
   2402                 args = (magic_arg_s, cell)
-> 2403                 result = fn(*args, **kwargs)
   2404             return result
   2405 

~/git/nodebook/nodebook/ipython/nodebookext.py in execute_cell(line, cell)
     79     # update code and run
     80     NODEBOOK_STATE['nodebook'].update_code(cell_id, cell)
---> 81     res, objs = NODEBOOK_STATE['nodebook'].run_node(cell_id)
     82 
     83     # update prompts

~/git/nodebook/nodebook/nodebookcore.py in run_node(self, node_id)
    114         input_hashes = {}
    115         for var in node.inputs.keys():
--> 116             val_hash = self._find_latest_output(node.parent, var)
    117             if val_hash is not None:
    118                 input_objs[var] = self.variables[val_hash]

~/git/nodebook/nodebook/nodebookcore.py in _find_latest_output(self, node, var)
    139                 return None
    140             else:
--> 141                 raise KeyError("name '%s' is not defined" % var)
    142 
    143         if var in node.outputs:

KeyError: "name 'e' is not defined"

Setting e = None beforehand seems to work as a workaround.