https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114736
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> --- It's probably latent on trunk. The assert verifies all vertices are backward reachable from the leafs. vertices and leafs are discovered with a DFS from the instances. So the question is what's that missing vertex and why is it not backward reachable.
