The missing dependencies are in the untested repo. Line for slapt-getrc:
Of course, that adds it as disabled -- can be turned on/off by editing directly or by source selection in GSlapt. Looks like the testing repo isn't being used now on 7.1, and I think that plans are currently to abandon it. Not sure, and at this point subject to change anyway.
But having those packages moved from untested to extra without bringing all the deps along does point up a problem, especially when untested is regularly purged.