Function luaL_checkversion_

depends/lua/src/lauxlib.c:1038–1047

LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver, size_t sz) {
  const lua_Number *v = lua_version(L);
  if (sz != LUAL_NUMSIZES)  /* check numeric types */
    luaL_error(L, "core and library have incompatible numeric types");
  if (v != lua_version(NULL))
    luaL_error(L, "multiple Lua VMs detected");
  else if (*v != ver)
    luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f",
                  (LUAI_UACNUMBER)ver, (LUAI_UACNUMBER)*v);
}