https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55522
--- Comment #8 from Orion Poplawski <orion at cora dot nwra.com> --- That version does not exist in RHEL7. Looks like it was a Mandriva thing: https://www.rpmfind.net/linux/RPM/mandriva/devel/cooker/x86_64/media/main/release/xz-5.1.2-0.alpha.1.x86_64.html
