Stefan Frings

Your idea solves the isInstance issue but I see other problems with this solution: - Encapsulation: C++ implementation details leak into Lua source code (e.g. using a map or unordered_map)....

I still tend to drop all `isInstance` functions which can't guarantee that the corresponding `get` function can be called successfully. - For most of the STL containers it's not feasible...

I can reproduce the issue in my environment as well. - most recent LuaBridge - Lua 5.4.2 - g++ 10.3.0 on Windows 10 with msys2 ``` lua_State* lua = luaL_newstate();...