Rudder

In Rudder 3.1.13, reports files were not correctly purged, so there are potentially a lot of reports files with different PID
When upgrading to latest version, the files are correctly purged after each run, and the dandling files after x days

It is possible, if reports files did not change, that there is a collision during the x days interval, and tmp and res files are not updated (because they are already correct)
Since reporting depend on the _repaired class, and the result is _kept, no report is made

Note: this is super random, and highly confusing