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Look at the community requests here: https://github.com/apache/incubator-mxnet/issues/7335

Kellen Sunderland: "There's a reasonable expectation that MXNet will be / is being used as a core library for a wide variety of machine learning services.  When we don't properly propagate errors through our language bindings it becomes extremely difficult to debug these services.  Crashing instead of propagating errors is the worst thing we could possibly do.  Imagine trying to support an SLA on a service where the core library is crashing every time it encounters a non-fatal error.  To me the usability for researchers and jupyter notebook issues should be noted, but crashing a production service for a non-fatal error should be the primary reason to develop a comprehensive fix."

Exception Handling for Iterators

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