The only change evident is coverage==5.0.1; the builds do not explicitly set a specific version (screenshot taken from here):
Otherwise everything is identical; the failing build shows coverage==5.0.2 (screenshot taken from here)
When i get home, I’ll explicitly create a branch forcing coverage to version 5.0.1 and see what happens. thanks again for all your help so far! I really hope you’re right and the problem is that easy!
Edit: Opened up this ticket here with coverage