userdata and the gc

[Adrian Sietsma <adrian_groups@...>]

Will a userdata's address change when the gc runs ?

ie:

lua_pushstring(L,"foo");
p = lua_newuserdata(L,sizeof(foo));
lua_rawset(L,LUA_REGISTRYINDEX);

... do something to force a gc

lua_pushstring(L,"foo");
lua_rawget(L,LUA_REGISTRYINDEX);
p1 = lua_touserdata(L,-1);
assert (p==p1); <----------------

Adrian