Comment 18 for bug 1591868

Just so it's clear - I haven't randomly reproduced this like all the people in this thread have, I manually inserted an error into a file and ran into identical problems as reported in this thread.

I don't know tons about how the YAML that ends up in /var/lib/app-info/yaml is generated, but I thought it was all based upon packages in the Ubuntu archives.

Since it's not a 100% reproduction rate, my conjecture would be a mirroring problem or download problem that introduced some corruption along the way. It would be great for someone who is inherently affected without doing anything wrong to share their contents of /var/lib/app-info/yaml while affected.