anthonator

anthonator

Hey all!

I’m receiving this dialyzer error from a library and I’m not sure how to suppress it on my end.

lib/core/distributed_registry.ex:17:callback_type_mismatch
Type mismatch for @callback init/1 in Horde.Registry behaviour.

Expected type:
{:ok, Keyword.t()}

Actual type:

  :ignore
  | {:ok,
     {%{:intensity => _, :period => _, :strategy => _}, [any()]}
     | %{
         :delta_crdt_options => %{:max_sync_size => _, :shutdown => _, :sync_interval => _},
         :distribution_strategy => _,
         :keys => _,
         :listeners => _,
         :members => _,
         :meta => _
       }}
  | {:stop, {:bad_return, {atom(), :init, _}}}


________________________________________________________________________________
done (warnings were emitted)
Halting VM with exit status 2

Thanks in advance!

Showing Posts 1 to 4

al2o3cr

al2o3cr

Crossreferencing DynamicSupervisor and Registry init spec is wrong. · Issue #181 · elixir-horde/horde · GitHub here for other readers.

We use Horde.Registry and have this same issue, ended up adding a .dialyzer_ignore.exs containing:

[
  {"path/from/your/error/message", :callback_type_mismatch, line_number_from_message}
]
anthonator

anthonator OP

Awesome! Thank you!

I ended up putting this at the top of my registry.

@dialyzer { :nowarn_function, init: 1 }
thousandsofthem

thousandsofthem

In similar cases @dialyzer { :nowarn doesn’t help much - indeed it does suppress the warning, except any function that uses that function will produce the warning instead. This means either i close my eyes on a few dozen of such warnings across the project or mark every single use with nowarn bandaid, making dyalyzer essentially half-useless. Fixing a library would be the solution, but could be not possible for various reasons

anthonator

anthonator OP

There’s only so much you can do if you don’t control the code. In this case a fix has been merged but not released.

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