[Spot] defrag_states: does it delete edges to erased states?

Hi there, In a preprocessing step, I want to flush a few states from a TωA. The one method that seems to be available is defrag_states, the description of which having the expected semantics. However, after defrag, it sometimes happens that the dst of some transitions points to delete states (-1U). The code of defrag_states in graph.hh removes the outgoing transitions of deleted states but does not seem to flush the transitions *pointing to* deleted states—is this the expected behavior? Cheers, M.