bcrowell said that, if you have a program whose code is using Digest::SHA1 and you cannot change this code, there is no way to fix the problem in Ubuntu 12.04. We all understood that Digest::SHA provides the same functions of Digest::SHA1, but this bug is not a matter of functionality, is a matter of API breakage.
In other words, having a code you CANNOT change and DOES USE Sigest::SHA1, libdigest-sha-perl doesn't work for you, because it only provides Digest::SHA.
I think you're not reading each other's post.
bcrowell said that, if you have a program whose code is using Digest::SHA1 and you cannot change this code, there is no way to fix the problem in Ubuntu 12.04. We all understood that Digest::SHA provides the same functions of Digest::SHA1, but this bug is not a matter of functionality, is a matter of API breakage.
In other words, having a code you CANNOT change and DOES USE Sigest::SHA1, libdigest-sha-perl doesn't work for you, because it only provides Digest::SHA.
This bug is not invalid IMHO.