I have been running a script that uses snapper and get the following line in the log:
2018-01-23 08:08:01| 42.7| 0.0|WARN |Snapper(SnappingFactory): Processed 83703 feature(s). 10930 were snapped, 72770 were untouched, and 3 were dropped because they snapped into a single point
I have tried to find where FME lists the 3 dropped records, but have been unable to. Snapper only has Snapped and Untouched as output so I can't just add an inspector to it.