4 files changed, 13 insertions, 4 deletions

diff --git a/src/_pch.hpp b/src/_pch.hpp
index 495a959..a77b7f5 100644
--- a/src/_pch.hpp
+++ b/src/_pch.hpp
@@ -1,5 +1,3 @@
-#pragma once
-
 #include <algorithm>
 #include <array>
 #include <atomic>
@@ -9,6 +7,7 @@
 #include <compare>
 #include <concepts>
 #include <condition_variable>
+#include <cstring>
 #include <functional>
 #include <iostream>
 #ifndef __PROSPERO__
@@ -19,6 +18,7 @@
 #include <ranges>
 #include <source_location>
 //#include <stop_token>
+#include <span>
 #include <string_view>
 #include <thread>
 #include <tuple>
diff --git a/src/linda.cpp b/src/linda.cpp
index a9ae61c..fa28385 100644
--- a/src/linda.cpp
+++ b/src/linda.cpp
@@ -1178,7 +1178,15 @@ LUAG_FUNC(linda)
         if (lua_isnil(L_, kIdxTop)) {
             lua_pop(L_, 1);
             lua_pushnumber(L_, _U->lindaWakePeriod.count());
-        } else {
+        } else if (luaG_type(L_, kIdxTop) == LuaType::STRING) {
+            if (luaG_tostring(L_, kIdxTop) != "never") {
+                luaL_argerror(L_, 1, "invalid wake_period");
+            } else {
+                lua_pop(L_, 1);
+                lua_pushnumber(L_, 0);
+            }
+        }
+        else {
             luaL_argcheck(L_, luaL_optnumber(L_, 2, 0) > 0, 1, "wake_period must be > 0");
         }
 
diff --git a/src/linda.hpp b/src/linda.hpp
index 7874db3..cff30e5 100644
--- a/src/linda.hpp
+++ b/src/linda.hpp
@@ -18,7 +18,7 @@ class Linda final
     {
         private:
         Linda& linda;
-        [[maybe_unused]] lua_State* const L; // just here for inspection while debugging
+        lua_State* const L{}; // just here for inspection while debugging
 
         public:
         KeeperOperationInProgress(Linda& linda_, lua_State* const L_)
diff --git a/src/macros_and_utils.hpp b/src/macros_and_utils.hpp
index 16011f7..1aca818 100644
--- a/src/macros_and_utils.hpp
+++ b/src/macros_and_utils.hpp
@@ -21,6 +21,7 @@ inline void STACK_GROW(lua_State* const L_, int const n_)
 
 // #################################################################################################
 
+// 1 unit of lua_Duration lasts 1 second (using default period of std::ratio<1>)
 using lua_Duration = std::chrono::template duration<lua_Number>;
 
 // #################################################################################################