https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113798
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I'm not sure if it's my bug or one of the decltype-in-lambda PRs, but x5 should
be deduced to int but we deduce it to int& :(. x6 works fine.
```
void
fn1 ()
{
int i = 0;
[&i](auto... pack) {
decltype(pack...[0]) x5 = 42; // type is int
decltype((pack...[0])) x6 = i; // type is int&
}(0);
}
```
