Hi, OK, to reproduce:
Just install gcc-8.2.0 and rebuild glibc using gcc-8.2.0. Using glibc built with gcc-8.2.0 causes test "sort-u-FMR" to fail. I am using glibc-2.27. -- Regards, Thomas Deutschmann / Gentoo Linux Developer C4DD 695F A713 8F24 2AA1 5638 5849 7EE5 1D5D 74A5