-Wuninitialized warning on current gcc

[roe85]

It seems that the -Wuninitalized warning which supposedly has been fixed is still active under certain conditions even on gcc trunk:
godbolt

#include <boost/optional.hpp>

boost::optional<int> bla()
{
    return {};
}

bool blub()
{
    return bla().has_value();
}

Is this an issue of gcc or boost::optional?

[akrzemi1]

This should be fixed by e31cf6f