Fixes for Erlang 19 RC

Signed-off-by: José Valim <jose.valim@plataformatec.com.br>

Author: José Valim

lib/elixir/lib/file/stream.ex

@@ -20,14 +20,15 @@ defmodule File.Stream do
     raw = :lists.keyfind(:encoding, 1, modes) == false
 
     modes =
-      if raw do
-        if :lists.keyfind(:read_ahead, 1, modes) == {:read_ahead, false} do
-          [:raw|modes]
-        else
-          [:raw, :read_ahead|modes]
-        end
-      else
-        modes
+      case raw do
+        true ->
+          if :lists.keyfind(:read_ahead, 1, modes) == {:read_ahead, false} do
+            [:raw | modes]
+          else
+            [:raw, :read_ahead | modes]
+          end
+        false ->
+          modes
       end
 
     %File.Stream{path: path, modes: modes, raw: raw, line_or_bytes: line_or_bytes}

lib/elixir/lib/gen_event.ex

@@ -650,7 +650,12 @@ defmodule GenEvent do
 
   def init_it(starter, parent, name, _, _, options) do
     Process.put(:"$initial_call", {__MODULE__, :init_it, 6})
-    debug = :gen.debug_options(options)
+    debug =
+      if function_exported?(:gen, :debug_options, 2) do
+        :gen.debug_options(name, options)
+      else
+        :gen.debug_options(options)
+      end
     :proc_lib.init_ack(starter, {:ok, self()})
     loop(parent, name(name), [], debug, false)
   end