Comment 14 for bug 922754

Reproducer attached. I can use this to reliably reproduce the busy loop on my laptop and in a VM. So hopefully this provides the clues we need!

In the process of refining this test case, I also repeatedly ran into a panic (!= EIO assertion failure in log.c), but I haven't been able to figure out again how to reproduce the error. Maybe there's another related bug lingering, or maybe it's a different manifestation of the same bug.