Capture this in lambda attribute inside a templated class vs not-templated class

Question

I have succeeded writing a class like this one, capturing this in a lambda defined as non-static attribute of said class:

#include <memory>
#include <iostream>
#include <functional>

struct S
{
S()
{
std::cout << "S::S()[" << this << "]" << std::endl;
}

std::string y_{"hi mate"};
int x_;
std::function<void(int*)> del_{[this](int *ptr)
{
std::cout << "Deleting ptr[" << ptr << "] this[" << this << "] this->y_[" << this->y_ << "]" << std::endl;
}};
std::unique_ptr<decltype(x_), decltype(del_)> unique_{&x_, del_};
};

int main()
{
S s;
}
This compiles and seems to run just fine.

However, with a templated class, it doesn't work anymore:

#include <memory>
#include <iostream>
#include <functional>

template <typename>
struct S
{
S()
{
std::cout << "S::S()[" << this << "]" << std::endl;
}

std::string y_{"hi mate"};
int x_;
std::function<void(int*)> del_{[this](int *ptr)
{
std::cout << "Deleting ptr[" << ptr << "] this[" << this << "] this->y_[" << this->y_ << "]" << std::endl;
}};
std::unique_ptr<decltype(x_), decltype(del_)> unique_{&x_, del_};
};

int main()
{
S<int> s;
}
$> g++ -std=c++1y custom_deleter_template.cpp
~/test custom_deleter_template.cpp: In instantiation of ‘struct S::’: custom_deleter_template.cpp:9:3: required from ‘S< >::S() [with = int]’ custom_deleter_template.cpp:24:10:
required from here custom_deleter_template.cpp:15:35: internal compiler error: in tsubst_copy, at cp/pt.c:12569
std::function del_{[this](int *ptr) ^ Please submit a full bug report, with preprocessed source if appropriate. See for instructions. Preprocessed source stored into /tmp/pyro/ccxfNspM.out file, please attach this to your bugreport.
Before filing a bugreport (which I can't do, they blocked account creation), is it normal that it does not compile, based on what the standard says?

Compiler is g++ (Ubuntu 4.9.2-0ubuntu1~14.04) 4.9.2, used flag -std=c++1y. Same thing happens with flag -std=c++11.

Answer 1

At g++ 8.1.0, using -std=c++2a -Wall, there are no errors and no warnings.

The execution results are
S::S()[0x7ffee48f96e0]
and
S::S()[0x7ffee4ae46d0]
respectively.

clang++ 6.0.0 can compile with same option also.

Best Regards.