[erlang-questions] Dialyzer, behaviours, plts and what not

Stavros Aronis <>
Thu Jan 7 16:29:27 CET 2016

Hi Brujo!

Thanks for the report! I have just created a pull request for a patch:


On Tue, Jan 5, 2016 at 7:33 PM Brujo Benavides <
> wrote:

> So, my friend Harenson <http://twitter.com/harenson> was dialyzing some
> code where we’ve implemented egithub_webhook behaviour from egithub
> <https://hex.pm/packages/egithub>, and he found this warning:
> Callback info about the egithub_webhook behaviour is not available
> Being a big fan of dialyzer myself, I immediately jumped in and tried to *fix
> *our code to avoid that warning.
> But this time, it turns out, it seems like we actually found a bug in
> dialyzer.
> We reduced the issue to its smallest possible expression and uploaded it
> here <https://github.com/elbrujohalcon/dialyzeit>.
> I’m pretty sure for most of you it will be just a curiosity, but just in
> case it actually helps someone, remember:
> *Don’t define a callback and add a not exported function with the same
> name and arity to the same module in your libraries.*
> At least, don’t do it until ERL-72 <http://bugs.erlang.org/browse/ERL-72> is
> fixed ;)
> Cheers!
> *Fernando “Brujo” Benavides*
> about.me/elbrujohalcon
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