Severity 1017072 serious Thanks I'm bumping this up to serious, because the version of rust-grcov currently in Debian has many broken build-dependencies, I could open a seperate bug for that but I don't think it's worthwhile.
There is work in progress packaging for an update of rust-grcov in the debcargo-conf repository, unfortunately the latest upstream version has a dependencies on a few crates that are not in debian. Specifically symbolic-common, symbolic-demangle and tera. Sylvestre prepared a patch that removed the dependencies on symbolic-common and symbolic-demangle, but the patch broke the build so I removed it from the patch series for now. Looking at the upstream git history it looks to me like eliminating those dependencies would be non-trivial. So it looks like before grcov can be updated those crates need to be packaged by someone (won't be me, I generally only package new stuff if I personally use it).
