From aa27bbb7e2dd3fe1c330b877a3803e9d3d21f161 Mon Sep 17 00:00:00 2001
From: Benoit Germain <benoit.germain@ubisoft.com>
Date: Wed, 27 Nov 2024 18:24:08 +0100
Subject: lanes_register() throws an error if called before Lanes is
 initialized

---
 src/lanes.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/lanes.cpp b/src/lanes.cpp
index d58f113..0b29a8f 100644
--- a/src/lanes.cpp
+++ b/src/lanes.cpp
@@ -215,12 +215,15 @@ LUAG_FUNC(require)
 // lanes.register( "modname", module)
 int lanes_register(lua_State* const L_)
 {
+    Universe* const _U{ Universe::Get(L_) };
+    if (!_U) {
+        raise_luaL_error(L_, "Lanes is not ready");
+    }
     std::string_view const _name{ luaG_checkstring(L_, StackIndex{ 1 }) };
     LuaType const _mod_type{ luaG_type(L_, StackIndex{ 2 }) };
     // ignore extra arguments, just in case
     lua_settop(L_, 2);
     luaL_argcheck(L_, (_mod_type == LuaType::TABLE) || (_mod_type == LuaType::FUNCTION), 2, "unexpected module type");
-    DEBUGSPEW_CODE(Universe* _U = Universe::Get(L_));
     STACK_CHECK_START_REL(L_, 0); // "name" mod_table
     DEBUGSPEW_CODE(DebugSpew(_U) << "lanes.register '" << _name << "' BEGIN" << std::endl);
     DEBUGSPEW_CODE(DebugSpewIndentScope _scope{ _U });
-- 
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