Lua shared object loading with C++ segfaults - c++

Question

For a project I'm writing I need to write a custom Lua module loading system, and I've done it before on my Raspberry Pi, but not on my Mac. The problem is that as soon as I try to access the lua_State in the shared object, the program segfaults.
main.cpp
#include <lua.hpp>
#include <dlfcn.h>
#include <iostream>
typedef void Register(lua_State*);
int main(){
lua_State* L = luaL_newstate();
void* lib = dlopen("module.so", RTLD_NOW);
if(!lib){
std::cerr << "Error opening module \"" << "\": " << dlerror() << std::endl;
return;
}
Register* loadFunc = (Register*)dlsym(lib, "RegisterModule");
if(!loadFunc){
std::cerr << "Error loading symbols from module \"" << "\": " << dlerror() << std::endl;
return;
}
loadFunc(L);
for(;;){}
return 1;
}
module.cpp
#include <lua.hpp>
#include <iostream>
static int Foo(lua_State* L){
std::cout << "Hello World!" << std::endl;
}
extern "C" void RegisterModule(lua_State* L){
lua_pushcfunction(L, Foo);
lua_setglobal(L, "Foo");
}
Makefile
lua = -L /usr/lib/lua5.2 -I /usr/include/lua5.2 -llua
luaHeaders = -I /usr/include/lua5.2
all: main module.so
rm -f main.o
main: main.o
clang++ main.o -o main $(lua) -ldl
main.o: main.cpp
clang++ -c main.cpp $(luaHeaders)
module.so: module.cpp
clang++ -fPIC -shared module.cpp -o module.so $(lua)
My setup is:
Mac OS X 10.9 Mavericks, and Elementary OS Luna
Lua 5.2
Clang
Output from the debugger (lldb)
Process 19943 stopped
* thread #2: tid = 0x23ec1c, 0x0000000100295c31 myModule.so`luaH_newkey + 913, stop reason = EXC_BAD_ACCESS (code=2, address=0x100073db0)
frame #0: 0x0000000100295c31 myModule.so`luaH_newkey + 913
myModule.so`luaH_newkey + 913:
-> 0x100295c31: movq %rax, 16(%r12)
0x100295c36: movl 8(%rbx), %eax
0x100295c39: movl %eax, 24(%r12)
0x100295c3e: testb $64, 8(%rbx)