[Bug c++/63526] O1 O2 O3 optimization and inline template constructor - uninitialized member

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63526

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Why do you think the member should be zero-initialized? Your constructor fails
to initialize it.