https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90609
Bug ID: 90609
Summary: Compilation error in std::function default member
initialization inside template class with defaulted
constructor
Product: gcc
Version: 9.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tgolyi at ya dot ru
Target Milestone: ---
When compiling the following code in gcc 9.1 compilation fails
#include <functional>
#include <memory>
template<typename T>
struct test
{
std::function<void(T *)> f = [](T *) {};
};
struct test2
{
test<double> d;
test<int> i;
};
void g ()
{
std::make_unique<test2> ();
}
Error is:
<source>:7:32: error: could not convert '<lambda closure
object>test<double>::<lambda(double*)>{}' from
'test<double>::<lambda(double*)>' to 'std::function<void(int*)>'
7 | std::function<void(T *)> f = [](T *) {};
| ^~~~~~~~~~
| |
| test<double>::<lambda(double*)>
If you provide empty constructor to test class everything works fine.
