CCleaner.exe /debug

I've read topics on here that talk about running Defraggler and Recuva in debug mode but I don't see any reference to running CCleaner.exe /debug. If I try it comes up with No update available when it checks for updates the same as Recuva does but it doesn't leave a log file in the CCleaner folder. Checking BeginnersGuide.chm it says /DEBUG - Runs the program in debug mode, only recommended for advanced users. So it doesn't produce a log file then? ;)