RuntimeError: maximum recursion depth exceeded

[vcuculo]

When creating a model that includes an ObservedMRDLayer and back_constraint enabled as mlp, it seems to get stuck in a recursive loop

File "build/bdist.linux-x86_64/egg/paramz/core/observable_array.py", line 125, in __ setslice __
File "build/bdist.linux-x86_64/egg/paramz/core/observable_array.py", line 119, in __ setitem __
File "build/bdist.linux-x86_64/egg/paramz/core/observable.py", line 91, in notify_observers
File "build/bdist.linux-x86_64/egg/paramz/core/parameter_core.py", line 510, in _pass_through_notify_observers
File "build/bdist.linux-x86_64/egg/paramz/core/observable.py", line 91, in notify_observers
File "build/bdist.linux-x86_64/egg/paramz/core/parameter_core.py", line 510, in _pass_through_notify_observers
File "build/bdist.linux-x86_64/egg/paramz/core/observable.py", line 91, in notify_observers
File "build/bdist.linux-x86_64/egg/paramz/core/parameter_core.py", line 508, in _parameters_changed_notification
File "build/bdist.linux-x86_64/egg/deepgp/layers/mrd.py", line 193, in parameters_changed
File "build/bdist.linux-x86_64/egg/deepgp/layers/mrd.py", line 143, in _aggregate_qX
File "build/bdist.linux-x86_64/egg/paramz/core/observable_array.py", line 125, in __ setslice __
File "build/bdist.linux-x86_64/egg/paramz/core/observable_array.py", line 118, in __ setitem __
File "build/bdist.linux-x86_64/egg/paramz/param.py", line 158, in __ getitem __
RuntimeError: maximum recursion depth exceeded in __ instancecheck __

Full log here

[vcuculo]

This seems to happen in the _aggregate_qX() function that in case of back_constraint=true tries several assignments to the variable X, including the following line:

PyDeepGP/deepgp/layers/mrd.py

Line 143 in 4ec944f

self.X.mean[:] = 0

but since X is an Observable array, it triggers the call to parameters_changed() function, that includes a call to _aggregate_qX() and so on...

@adamian any hint?