Oh, I only checked that this package is BD-Uninstallable on Debian. And at https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1029943 the maintainer want it to be removed on riscv64 too.
So actually it's because rust-ring is not built on Debian due to failures in tests. But Ubuntu has this package on riscv64 since we don't run tests.
Oh, I only checked that this package is BD-Uninstallable on Debian. And at https:/ /bugs.debian. org/cgi- bin/bugreport. cgi?bug= 1029943 the maintainer want it to be removed on riscv64 too.
So actually it's because rust-ring is not built on Debian due to failures in tests. But Ubuntu has this package on riscv64 since we don't run tests.