The current version of the dump package is 0.4b43. Gentoo's app-arch/dump-0.4.42 is still keyworded, and corresponds to version 0.4b42. IMHO it should be stabilized, especially as it's the version which supports ext4, and that's now rather common. Reproducible: Always
See also bug #370637. It doesn't affect 0.4.42 it seems.
we already have 0.4.44-r1 stable, so, closed.