Comment 9 for bug 1640326

Taglib fix is in the linked branch.

The thumbnailer test dumps core on all architectures on zesty. The fault keeps moving around, looks like a race condition. We are not using threads ourselves, so the problem likely is in a something we call into. Candidates would be QT and (unlikely) leveldb.

I've run the tests for several hours continuously on my zesty amd64 VM, without error. The fault shows up only in the silo.

For added amusement, the qml test for vivid arm64 is segfaulting. I have no idea what might be causing this. The thumbnailer code has been stable for many months and hasn't ever had this kind of problem.

I suspect that the issue is with something that is installed on the builder. But there is no way to get a core dump when something fails in a builder, so I don't know how to debug this. Without a core dump, we are stabbing around in the dark :-(