stop notebook on error

Is there a way for the notebook to stop running on error? It ignores my Panic statements (other than just printing out) and even os.Exit doesn't seem to do much. Am I missing somethign?

Start by tracing how the Go notebook kernel handles panic statements and os.Exit during notebook execution. Compare the kernel's error and process-exit behavior with the expected stop-on-error behavior, then verify that execution halts rather than only printing the error.

Written by the indexing model from the issue text.