Cleanup build_new, remove unneeded try-with and debug interaction of on_morphisms and under_lambdas.
Cleanup build_new, remove unneeded try-with and debug interaction of
on_morphisms and under_lambdas.


git-svn-id: a49b465eaba45b67e2e1e4e0b2c256a71f59fecb@10952 85f007b7-540e-0410-9357-904b9bb8a0f7

SamB/coq