Fix nsga2 bug

pyoptsparse/pyNSGA2/source/allocate.c

@@ -30,7 +30,7 @@ void allocate_memory_ind (individual *ind, Global global)
     if (global.nbin != 0)
     {
         ind->xbin = (double *)malloc(global.nbin*sizeof(double));
-        ind->gene = (int **)malloc(global.nbin*sizeof(int));
+        ind->gene = (int **)malloc(global.nbin*sizeof(int *));
         for (j=0; j<global.nbin; j++)
         {
             ind->gene[j] = (int *)malloc(global.nbits[j]*sizeof(int));

pyoptsparse/pyNSGA2/source/crowddist.c

@@ -26,7 +26,7 @@ void assign_crowding_distance_list (population *pop, list *lst, int front_size,
         pop->ind[lst->child->index].crowd_dist = INF;
         return;
     }
-    obj_array = (int **)malloc(global.nobj*sizeof(int));
+    obj_array = (int **)malloc(global.nobj*sizeof(int *));
     dist = (int *)malloc(front_size*sizeof(int));
     for (i=0; i<global.nobj; i++)
     {
@@ -66,7 +66,7 @@ void assign_crowding_distance_indices (population *pop, int c1, int c2, Global g
         pop->ind[c2].crowd_dist = INF;
         return;
     }
-    obj_array = (int **)malloc(global.nobj*sizeof(int));
+    obj_array = (int **)malloc(global.nobj*sizeof(int *));
     dist = (int *)malloc(front_size*sizeof(int));
     for (i=0; i<global.nobj; i++)
     {

tests/test_nsga2_multi_objective.py

@@ -52,7 +52,7 @@ def setup_optProb(self, n_obj):
     @parameterized.expand(
         [
             (1,),
-            # (2,), # skipping flaky multi-objective test
+            (2,),
         ]
     )
     def test_opt(self, n_obj):