From 8edc730edc77dbb215ba930fc99b9804e7be7ad0 Mon Sep 17 00:00:00 2001
From: Qqwy/Wiebe-Marten Wijnja <w-m@wmcode.nl>
Date: Mon, 27 May 2019 14:28:13 +0200
Subject: [PATCH 1/2] Fixes #9081 by improving documentation of
 GenServer.server() type.

---
 lib/elixir/lib/gen_server.ex | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/lib/elixir/lib/gen_server.ex b/lib/elixir/lib/gen_server.ex
index 5ac5130cad6..7aaa5292a69 100644
--- a/lib/elixir/lib/gen_server.ex
+++ b/lib/elixir/lib/gen_server.ex
@@ -717,8 +717,13 @@ defmodule GenServer do
   @typedoc "Debug options supported by the `start*` functions"
   @type debug :: [:trace | :log | :statistics | {:log_to_file, Path.t()}]
 
-  @typedoc "The server reference"
-  @type server :: pid | name | {atom, node}
+  @typedoc """
+  The server reference.
+
+  This is either a plain PID or a value representing a registered name.
+  See the 'Name registration' section of this document for more information.
+  """
+  @type server :: pid | name | {atom, node} | {:via, registry :: atom(), key :: term()}
 
   @typedoc """
   Tuple describing the client of a call request.
@@ -1022,6 +1027,9 @@ defmodule GenServer do
   not yet connected to the caller one, the semantics differ
   depending on the used Erlang/OTP version.
 
+  `server` can be any of the values described in the "Name registration"
+  section of the documentation for this module.
+
   Before Erlang/OTP 21, the call is going to block until a
   connection happens. This was done to guarantee ordering.
   Starting with Erlang/OTP 21, both Erlang and Elixir do

From 1da1407bab87b7f270dd6bbb492901e3c454ca70 Mon Sep 17 00:00:00 2001
From: Fernando Tapia Rico <fertapric@gmail.com>
Date: Mon, 27 May 2019 15:54:39 +0200
Subject: [PATCH 2/2] Update gen_server.ex

---
 lib/elixir/lib/gen_server.ex | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/elixir/lib/gen_server.ex b/lib/elixir/lib/gen_server.ex
index 7aaa5292a69..21316850b8b 100644
--- a/lib/elixir/lib/gen_server.ex
+++ b/lib/elixir/lib/gen_server.ex
@@ -721,9 +721,9 @@ defmodule GenServer do
   The server reference.
 
   This is either a plain PID or a value representing a registered name.
-  See the 'Name registration' section of this document for more information.
+  See the "Name registration" section of this document for more information.
   """
-  @type server :: pid | name | {atom, node} | {:via, registry :: atom(), key :: term()}
+  @type server :: pid | name | {atom, node} | {:via, registry :: module(), key :: term()}
 
   @typedoc """
   Tuple describing the client of a call request.