[Bug c++/84126] [8 Regression] ICE in variadic generic lambda inside a template function calling a function with arguments by reference

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84126

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
C++14 version:

template <class... Ts>
void sink(Ts...);

template <typename T>
int bar(T&); // ICE with reference, work with just T

template <typename T >
void foo(T){
  [](auto ... k){
    sink (bar(k) ...);
  }(0);
}

int main() {
  foo(0);
}