id summary reporter owner description type status milestone component version severity resolution keywords cc 6839 distributed::adjacency_list fails to propagate mpi_process_group correctly Sebastian Jeltsch Jeremiah Willcock In the distributed `adjacency_list` the `named_graph_mixin` of kind maybe_named_graph holds and `mpi_process_group` member which is default constructed rather than appropriately initialized. See patch Patches new To Be Determined graph Boost 1.50.0 Problem parallel graph library process_group