[Bug c++/57728] Explicit template instantiation with defaulted method causes missing symbol

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57728

--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Jens, see the discussion in https://bugs.llvm.org/show_bug.cgi?id=22763

Jason, should this be closed as FIXED for 6.3 and up? I believe what Jens
observes is the intended behaviour of GCC and Clang now.