https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67768
Bug ID: 67768
Summary: Second and subsequent captured variable in variadic
template unpaking are default constructed
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dtyazskwindows7 at gmail dot com
Target Milestone: ---
When you compile and run the following code in gcc6.0
=================================
#include<iostream>
#include<utility>
#include<tuple>
template<std::size_t I,class T>T echo(T v)
{
return v;
}
template<std::size_t... Is>auto run(std::index_sequence<Is...>)
{
int x = 10;
return std::make_tuple(echo<Is>([y=x](){std::cout<<y<<std::endl;})...);
}
int main()
{
auto v = run(std::make_index_sequence<3>());
std::get<0>(v)();
std::get<1>(v)();
std::get<2>(v)();
}
========================================
output is as follows:
10
0
0
