[Bug libstdc++/89164] can construct vector with non-copyable-but-trivially-copyable elements

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89164

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
N.B. the report is missing that it is only accepted for c++17 and c++2a modes.
For c++14 it's rejected as expected.