c – 编译器错误,还是非标准代码？ – lambda中的变异模板捕获

template<typename... T>
int g(T... t)
{
    return 0;
}

template<class... Args>
void f(Args... args)
{
    auto lm = [&,args...] { return g(args...); };
    lm();
}

int main()
{
    f(2,5,7);
}

据我所知,我相信这是有效的C 11.标准第5.1.2.23节;

A capture followed by an ellipsis is a
pack expansion (14.5.3). [ Example:

06001

— end example ]

然而,当Clang编译好时,G提供了这个错误;

main.cpp: In function 'void f(Args ...)':
main.cpp:10:23: error: expected ',' before '...' token
     auto lm = [&,args...] { return g(args...); };
                   ^
main.cpp:10:23: error: expected identifier before '...' token
main.cpp:10:26: error: parameter packs not expanded with '...':
     auto lm = [&,args...] { return g(args...); };
                      ^
main.cpp:10:26: note:         'args'
main.cpp: In lambda function:
main.cpp:10:43: error: expansion pattern 'args' contains no argument packs
     auto lm = [&,args...] { return g(args...); };
                                       ^
main.cpp: In instantiation of 'struct f(Args ...) [with Args = {int,int,int}]::__lambda0':
main.cpp:10:49:   required from 'void f(Args ...) [with Args = {int,int}]'
main.cpp:16:14:   required from here
main.cpp:10:19: error: using invalid field 'f(Args ...)::__lambda0::__args'
     auto lm = [&,args...] { return g(args...); };
                   ^

所以我的问题很简单,这是G中的编译器错误吗？