# 
# 
# patch "tester.cc"
#  from [dd220bcf13b0837562660dbcbd1eadc5f85e6784]
#    to [72086e113837df6e063ec10d31f4710947f5c235]
# 
============================================================
--- tester.cc	dd220bcf13b0837562660dbcbd1eadc5f85e6784
+++ tester.cc	72086e113837df6e063ec10d31f4710947f5c235
@@ -426,7 +426,7 @@ LUAEXT(unset_env, )
 
 LUAEXT(unset_env, )
 {
-  char const * var = luaL_checkstring(L, -2);
+  char const * var = luaL_checkstring(L, -1);
   if (orig_env_vars.find(string(var)) == orig_env_vars.end()) {
     char const * old = getenv(var);
     if (old)