  It was conjectured in \cite{Namikawa_ExtendedTorelli} that the Torelli map
$M_g\to A_g$ associating to a curve its jacobian extends to a regular map from
the Deligne-Mumford moduli space of stable curves $\bar{M}_g$ to the
(normalization of the) Igusa blowup $\bar{A}_g^{\rm cent}$. A counterexample in
genus $g=9$ was found in \cite{AlexeevBrunyate}.
  Here, we prove that the extended map is regular for all $g\le8$, thus
completely solving the problem in every genus.
