Wasn’t sure either about that, but one of the contributors to the nbconvert project claims that it is part of the spec to return a non-zero exit code when a cell fails: https://github.com/jupyter/nbconvert/issues/1058
It makes sense to me 
Wasn’t sure either about that, but one of the contributors to the nbconvert project claims that it is part of the spec to return a non-zero exit code when a cell fails: https://github.com/jupyter/nbconvert/issues/1058
It makes sense to me