context: check if restful URI scheme is None #77
Merged
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Before starting the status listener thread, we not only need to check if the RestfulUri variant != None, but we also need to verify the user specified a restful URI scheme at all.
This prevents a panic when we call
status_listener()due to hitting anunreachable!()code path. Functionally, the panic didn't affect users; it's difficult to catch since the VM starts immediately after the message is printed to stdout.