It's possible that the host was disconnected when attempting to notify
guests of a file save, so we need to transmit this in order to correctly
update the file's mtime.
Next failing seed OPERATIONS=200 SEED=6894
We were seeing non-deterministic behavior in randomized tests when
generating backtraces took enough time to cause transactions to group
in some cases, but not group in others.
Tests will need to explicitly opt into grouping if they want it by
setting the interval explicitly. We have tests in the text module that
currently test the history grouping explicitly, but I'm not sure
it's needed elsewhere.
