C++17 doesn't allow to declare defaulted move ctor with not matching
exception specification to the calculated one:
/Users/eddie/Downloads/BUILD/openmw-master/apps/openmw/mwclass/creature.cpp:63:9: error:
exception specification of explicitly defaulted move constructor does not
match the calculated one
CreatureCustomData(CreatureCustomData&& other) noexcept = default;
^
http://wg21.link/p1286r2 makes this possible in C++20 and newer compilers
already have it working even with -std=c++17 but older onces give an error.
e1d955d92b