[Bug c++/105667] [C++20] lambas in template argument sometimes causes an ICE (seg fault)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105667

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[C++20] templated lambas in |[C++20] lambas in template
                   |template argument sometimes |argument sometimes causes
                   |causes an ICE (seg fault)   |an ICE (seg fault)

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed. something slightly shorter, changing the class template to a
function template and changing some other things slightly too.
problem is related to lamba as a template argument.

template<auto f>
struct h {typedef int type;};

template<class Types>
struct t{};

template<typename Ts>
void crash() {
    using Types = typename h<[]() {}>::type;
    auto f = [&] <int i> () {
        using type = t<Types>;
    };
    f.template operator()<1>();
}

int main() {
    crash<int>();
    return 0;
}