This package uses the deprecated EGO_SUM go-module.eclass variable. It must be migrated to dep tarballs (see eclassdocs) or vendored deps if upstream provide them.
$ pkgcheck scan -k DeprecatedEclassVariable net-analyzer/chronograf
DeprecatedEclassVariable: version 1.8.5: uses deprecated variable on line 11: EGO_SUM (no replacement)
William asked that I comment on all of these bugs to note you don't need to revbump to fix it as it'll be successfully installed already.