tracks/haskell/exercises/space-age/src/SpaceAge.hs in trackler-2.0.6.11 vs tracks/haskell/exercises/space-age/src/SpaceAge.hs in trackler-2.0.6.12

@@ -8,6 +8,6 @@
             | Saturn
             | Uranus
             | Neptune
 
 ageOn :: Planet -> Float -> Float
-ageOn planet seconds = undefined
+ageOn planet seconds = error "You need to implement this function."