Method handleError

source/core/StarLua.cpp:681–710

}

void LuaEngine::handleError(lua_State* state, int res) {
  if (res != LUA_OK) {
    if (lua_islightuserdata(state, -1)) {
      void* error = lua_touserdata(state, -1);
      if (error == &s_luaInstructionLimitExceptionKey) {
        lua_pop(state, 1);
        throw LuaInstructionLimitReached();
      }
      if (error == &s_luaRecursionLimitExceptionKey) {
        lua_pop(state, 1);
        throw LuaRecursionLimitReached();
      }
    }

    String error;
    if (lua_isstring(state, -1))
      error = strf("Error code {}, {}", res, lua_tostring(state, -1));
    else
      error = strf("Error code {}, <unknown error>", res);

    lua_pop(state, 1);

    // This seems terrible, but as far as I can tell, this is exactly what the
    // stock lua repl does.
    if (error.endsWith("<eof>"))
      throw LuaIncompleteStatementException(error.takeUtf8());
    else
      throw LuaException(error.takeUtf8());
  }
}

int LuaEngine::pcallWithTraceback(lua_State* state, int nargs, int nresults) {
  int msghPosition = lua_gettop(state) - nargs;