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how do I get this to work
spawn(fun() -> io:get_line("Prompt>") end).
to where it would work as if it didn’t have the spawn. I tried standard_io and group_leader() but doesn’t make difference.
Try
What you see is a race condition between shell and your spawn/1. Generally when doing anything with io:get_line I would advice using ‘erl -noshell -s Mod Fun’ to start the program as that makes this issue go away.