Sleep curtailment is accompanied by increased intake of calories from snacks

From the American Journal of Clinical Nutrition 89.1(2009) 126-133
If you are overworked this study indicates you will try to compensate for lost sleep by eating more snack foods. I guess the energy that is normally restored by sufficient rest is no longer available so the human in its marvelous wisdon says to itself,"we are going to die if we don't get some carbs."
This is not happening at meal time it is happening times when metabolic reserves would suffice but the brain deprived of rest decides it needs to take on more energy. A candy bar here and a energy drink there and pretty soon fat starts to add on. It is not the fault of the food it is the human, pressed to perform more than is possible without paying a price metabolically. Shift workers also pay a price for the changing sleep patterns. Health is more than eating and exercise, it is a balance of food motion and recovery.Also if you are wanting to lose weight, it might be wise to get enough sleep.