Corner case bugifx

manduca/Population.py

@@ -252,6 +252,7 @@ class EvolutionSimulator(object):
           idxs = rng.choice(len(unfit_manducas), num_random, replace=False)
           randomly_selected_manducas = list(unfit_manducas[idxs])
       else:
+          idxs = []
           randomly_selected_manducas = []
       # Pick the rest randomly, weighted by fitness
       remaining_manducas = self.evolution_parameters.max_population - num_fittest - num_random