Hello! glibc is currently broken on sparc64. All versions 2.35-1 and newer result in a segmentation fault during upgrade, so please don't upgrade the package for the time being.
Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913