Compile process upfront and do not rely on it in the error handler

Author: José Valim

lib/elixir/lib/kernel/error_handler.ex

@@ -17,7 +17,7 @@ defmodule Kernel.ErrorHandler do
     case Code.ensure_loaded(module) do
       { :module, _ } -> []
       { :error, _ } ->
-        parent = Process.get(:elixir_compiler_pid)
+        parent = :erlang.get(:elixir_compiler_pid)
         parent <- { :waiting, self(), module }
         receive do
           { :release, ^parent } -> :ok

lib/elixir/src/elixir_compiler.erl

@@ -226,6 +226,7 @@ core_main() ->
     "lib/elixir/lib/access.ex",
     "lib/elixir/lib/regex.ex",
     "lib/elixir/lib/system.ex",
+    "lib/elixir/lib/process.ex",
     "lib/elixir/lib/kernel/cli.ex",
     "lib/elixir/lib/kernel/error_handler.ex",
     "lib/elixir/lib/kernel/parallel_compiler.ex",