1 files changed, 2 insertions, 1 deletions
diff --git a/src/lua.c b/src/lua.c
index 45ceeb9..8729229 100644
--- a/src/lua.c
+++ b/src/lua.c
@@ -272,10 +272,11 @@ void luaI_deepcopy(lua_State* src, lua_State* dest, enum deep_copy_flags flags){
                      lua_pushlightuserdata(dest, lua_touserdata(src, -1)); 
                      break;
     case LUA_TTHREAD:
+                     sprintf(stderr, "unable to copy LUA_TTHREAD, pushing nil\n");
                      lua_pushnil(dest);
                      break; 
     default:
-                     printf("unknown type %i vs (old)%i\n",lua_type(src, -1), type);
+                     sprintf(stderr, "unknown type %i vs (old)%i\n",lua_type(src, -1), type);
                      //abort();
                      lua_pushnil(dest);
                      break;