Proposed Changes

gen_statem:call/3 can fail if the server shuts down before replying to the call, exiting with {shutdown, Location}. We can handle this exit like the other exits in the gen_statem_safe_call/3. I think it makes sense to return {error, noproc} in this case since it's effectively the same as the server not being alive, but I think an {error, shutdown} return could be ok as well.

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