added test for broken assembly with boundary vartrees
Merge branch 'missing_deriv_fix' of https://github.com/JustinSGray/OpenMDAO-Framework into vtree_boundary
removed visited check in _explode_vartrees from depgraph.
switched to sets of edges instead of nodes
need to check differently for visited
numerical failure
Merge branch 'vtree_boundary' of github.com:naylor-b/OpenMDAO-Framework into vtree_boundary
some cleanup
fixed passthrough problem with vtrees. They were being copied in the old way
fixes for more bugs
real fix for bugs
real fix for bugs
merged in other fix
wild guess to fix an apparent bug that was introduced when I merged in the other branch
Merge pull request #1627 from Kenneth-T-Moore/dev

Fix for a warning about complex casting
Merge branch 'vtree_boundary' of github.com:naylor-b/OpenMDAO-Framework into vtree_boundary
Fixed my bug
fix on test
cache added
added deriv_ignore metadata