Comment 5 for bug 1570304

@pi3rra, yes re-running works as a workaround, but unfortunately only in this simple test case.

For example, adding another file to dir2 before running the level1 incremental makes even the second extract attempt to fail.

Debian tracks this bug at https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=648048

Upstream discussion: http://lists.gnu.org/archive/html/bug-tar/2016-07/msg00025.html