Forwarded: https://github.com/Ultimaker/CuraEngine/issues/984
The Fedora maintainer already reported the issue upstream and applied a patch: https://src.fedoraproject.org/rpms/CuraEngine/blob/master/f/CuraEngine-gcc9.patch However, this patch makes the package unbuildable on GCC 8, so it will need additional logic to work on both compilers.
