feature request: stop notebook execution upon cell failure

[jameswarren]

When running all cells in a notebook, it would be helpful if a user can specify whether a failure in a cell would prevent execution of all subsequent cells, analogous to the set -e behavior of bash.

Early termination appears to be the default behavior of the CLI:

[sourishkrout]

Thanks for reporting this, @jameswarren. We'll treat this as a bug since the behavior is inconsistent.