missing NCI thunks are an exception, not a panic also stronger assertions in NCI thunk lookup
missing NCI thunks are an exception, not a panic
also stronger assertions in NCI thunk lookup


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@45088 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot