Post #3336294

Well that's one of the hardest bugs I've ever tracked down. Took like six hours of tracing through this stupidly complicated memoized graph traversal transitive-closure thing to figure out that deep inside we were sharing mutable structures. https://github.com/jepsen-io/elle/commit/5cc2ecaf1a0619ea8a3d91adc4740073202c1045