Fix calls to error/1

lib/lua/util.ex

@@ -65,6 +65,7 @@ defmodule Lua.Util do
             nil -> " <unknown function>#{format_args(args)}"
             "-no-name-" -> ""
             {:luerl_lib_basic, :basic_error} -> format_error(func, args)
+            {:luerl_lib_basic, :basic_error, :undefined} -> format_error(func, args)
             func -> " #{format_function([func], args)}"
           end
 
@@ -127,6 +128,10 @@ defmodule Lua.Util do
     format_function("error", args)
   end
 
+  defp format_error({:luerl_lib_basic, :basic_error, :undefined}, args) do
+    format_function("error", args)
+  end
+
   defp format_error(_, {:undefined, args}) do
     format_function("unknown_error", args)
   end

mix.exs

@@ -2,7 +2,7 @@ defmodule Lua.MixProject do
   use Mix.Project
 
   @url "https://github.com/tv-labs/lua"
-  @version "0.0.1"
+  @version "0.0.2"
 
   def project do
     [

test/lua_test.exs

@@ -256,6 +256,22 @@ defmodule LuaTest do
         """)
       end
     end
+
+    test "error/1 raises an exception" do
+      error = """
+      Lua runtime error: error("this is an error")
+
+      script line 1:error("this is an error")
+      """
+
+      assert_raise Lua.RuntimeException, error, fn ->
+        lua = Lua.new(sandboxed: [])
+
+        Lua.eval!(lua, """
+        error("this is an error")
+        """)
+      end
+    end
   end
 
   describe "set!/2 and get!/2" do