[Bug c++/80873] ICE in tsubst_copy when trying to use an overloaded function without a definition in a lambda

[hafnermorris at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80873

--- Comment #1 from Morris Hafner <hafnermorris at gmail dot com> ---
I managed to create an example that is a valid program:

struct Buffer {};

auto parse(Buffer b);
template <typename T> void parse(T target);

template <typename T>
auto field(T target) {
        return [&] {
                parse(target);
        };
}

template <typename T>
void parse(T target) {}

auto parse(Buffer b) {
        field(0);
}

int main() {
}