Regarding #310 and #315,
AppVeyor just randomly fails partway through testing on v10 with no output or reasoning. Try to log any output and it starts working, so it's seemingly impossible to figure out for now. Gonna hit up @FeodorFitsner to see if he has any ideas. A few times now the same commit has given different results (eg make commit A, get result a, pushing commit B on top of A, get result b, and then force push commit A back again as head, and get a different result c.