Ensure we escape config before injecting into escript

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

Author: José Valim

lib/mix/lib/mix/tasks/escript.build.ex

@@ -221,7 +221,7 @@ defmodule Mix.Tasks.Escript.Build do
   defp gen_main(name, module, app, language) do
     config =
       if File.regular?("config/config.exs") do
-        Mix.Config.read!("config/config.exs")
+        Macro.escape Mix.Config.read!("config/config.exs")
       else
         []
       end
@@ -275,6 +275,7 @@ defmodule Mix.Tasks.Escript.Build do
   defp main_body_for(:elixir) do
     quote do
       erl_version = :erlang.system_info(:otp_release)
+
       case :string.to_integer(erl_version) do
         {num, _} when num >= 17 -> nil
         _ ->

lib/mix/test/mix/tasks/escript_test.exs

@@ -77,7 +77,7 @@ defmodule Mix.Tasks.EscriptTest do
     in_fixture "escripttest", fn ->
       File.mkdir_p! "config"
       File.write! "config/config.exs", """
-      [foobar: [value: "FROM CONFIG"]]
+      [foobar: [value: "FROM CONFIG", other: %{}]]
       """
       Mix.Tasks.Escript.Build.run []
       assert_received {:mix_shell, :info, ["Generated escript escriptest with MIX_ENV=dev"]}