Several bugs in override_mask

[rkishony]

Several bugs in override_mask:

x = iquib(2)
x.assign_value(7)
x.get_override_mask().get_value()

yields

---------------------------------------------------------------------------
ExternalCallFailedException               Traceback (most recent call last)
/var/folders/90/frsch0qx4nb6qc5hzm_jrvvr0000gn/T/ipykernel_2346/3754138513.py in <module>
      3 #x[1][1] = 0
      4 x.assign_value(7)
----> 5 x.get_override_mask().get_value()

~/Git/pyquibbler/pyquibbler/quib/function_quibs/external_call_failed_exception_handling.py in _wrapper(*args, **kwargs)
     86         except ExternalCallFailedException as e:
     87             # We want to remove any context
---> 88             raise ExternalCallFailedException(exception=e.exception,
     89                                               quibs_with_calls=e.quibs_with_calls,
     90                                               tb=e.traceback) from None

ExternalCallFailedException: Failed to execute get_override_mask(QuibRef(quib=x = iquib(2)))

The following quibs were in the stack of the exception: 
  File "('/var/folders/90/frsch0qx4nb6qc5hzm_jrvvr0000gn/T/ipykernel_2346/3754138513.py', 5)", line None
	get_override_mask(QuibRef(quib=x = iquib(2))) -> get_value() 
  File "('/var/folders/90/frsch0qx4nb6qc5hzm_jrvvr0000gn/T/ipykernel_2346/3754138513.py', 5)", line None
	get_override_mask(QuibRef(quib=x = iquib(2))) -> get_shape()  

IndexError: list index out of range

[rkishony]

Here is another, different, error:

x = iquib([1, [2, 3], 4])
x[1][1] = 0
x.get_override_mask().get_value()

yields:

/Users/roeekishony/.conda/envs/pyquibbler/lib/python3.9/site-packages/numpy/core/fromnumeric.py:1970: 
VisibleDeprecationWarning: Creating an ndarray from ragged nested sequences 
(which is a list-or-tuple of lists-or-tuples-or ndarrays with different lengths or shapes) is deprecated. 
If you meant to do this, you must specify 'dtype=object' when creating the ndarray.
  result = asarray(a).shape

[rkishony]

and yet another:

x = iquib([1, 2, 3])
x[1] = 0
x.assign_value(7)
x.get_override_mask().get_value()

yields:

---------------------------------------------------------------------------
ExternalCallFailedException               Traceback (most recent call last)
/var/folders/90/frsch0qx4nb6qc5hzm_jrvvr0000gn/T/ipykernel_2346/756016232.py in <module>
      2 x[1] = 0
      3 x.assign_value(7)
----> 4 x.get_override_mask().get_value()

~/Git/pyquibbler/pyquibbler/quib/function_quibs/external_call_failed_exception_handling.py in _wrapper(*args, **kwargs)
     86         except ExternalCallFailedException as e:
     87             # We want to remove any context
---> 88             raise ExternalCallFailedException(exception=e.exception,
     89                                               quibs_with_calls=e.quibs_with_calls,
     90                                               tb=e.traceback) from None

ExternalCallFailedException: Failed to execute get_override_mask(QuibRef(quib=x = iquib([1, 2, 3])))

The following quibs were in the stack of the exception: 
  File "('/var/folders/90/frsch0qx4nb6qc5hzm_jrvvr0000gn/T/ipykernel_2346/756016232.py', 4)", line None
	get_override_mask(QuibRef(quib=x = iquib([1, 2, 3]))) -> get_value() 
  File "('/var/folders/90/frsch0qx4nb6qc5hzm_jrvvr0000gn/T/ipykernel_2346/756016232.py', 4)", line None
	get_override_mask(QuibRef(quib=x = iquib([1, 2, 3]))) -> get_shape()  

TypeError: 'bool' object does not support item assignment