darkmarmot
Any way subscribe to Registry's 'unregister'?
I would find it quite useful to be able to get a callback when Registry removes a {pid, value} on process death (even if this is deferred).
Looking through Registry’s code, though, I couldn’t find the spot where it even handles this. 
Any ideas or line numbers in the repo would be appreciated! Thanks!
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benwilson512
You’d probably be better off explicitly having one of your own processes monitor the process you wish to be messaged about.
michalmuskala
I think you should be able to use the listeners option to achieve what you want - https://hexdocs.pm/elixir/Registry.html#start_link/1
josevalim
That’s what the documentation refers to. You are only notified of explicit registration/unregistration. If you want to know a process crashed, then you need to monitor it, as suggested by @benwilson512.
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