output: #fixed code
                                  @NotNull
      public List<Entry> generate(@NotNull Scope scope, @NotNull String path) {
          List<Entry> result = new ArrayList<Entry>();
  
          Set<Binding> entries = new TreeSet<Binding>();
          for (Binding b : scope.values()) {
              if (!b.isSynthetic()
                      && !b.isBuiltin()
                      && !b.getDefs().isEmpty()
                      && path.equals(b.getSingle().getFile())) {
                  entries.add(b);
              }
          }
  
          for (Binding nb : entries) {
              Def signode = nb.getSingle();
              List<Entry> kids = null;
  
              if (nb.getKind() == Binding.Kind.CLASS) {
                  Type realType = nb.getType();
                  if (realType.isUnionType()) {
                      for (Type t : realType.asUnionType().getTypes()) {
                          if (t.isClassType()) {
                              realType = t;
                              break;
                          }
                      }
                  }
                  kids = generate(realType.getTable(), path);
              }
  
              Entry kid = kids != null ? new Branch() : new Leaf();
              kid.setOffset(signode.getStart());
              kid.setQname(nb.getQname());
              kid.setKind(nb.getKind());
  
              if (kids != null) {
                  kid.setChildren(kids);
              }
              result.add(kid);
          }
          return result;
      }
input: #vulnerable code 
                                  @NotNull
      public List<Entry> generate(@NotNull Scope scope, @NotNull String path) {
          List<Entry> result = new ArrayList<Entry>();
  
          Set<Binding> entries = new TreeSet<Binding>();
          for (Binding b : scope.values()) {
              if (!b.isSynthetic()
                      && !b.isBuiltin()
                      && !b.getDefs().isEmpty()
                      && path.equals(b.getFirstNode().getFile())) {
                  entries.add(b);
              }
          }
  
          for (Binding nb : entries) {
              Def signode = nb.getFirstNode();
              List<Entry> kids = null;
  
              if (nb.getKind() == Binding.Kind.CLASS) {
                  Type realType = nb.getType();
                  if (realType.isUnionType()) {
                      for (Type t : realType.asUnionType().getTypes()) {
                          if (t.isClassType()) {
                              realType = t;
                              break;
                          }
                      }
                  }
                  kids = generate(realType.getTable(), path);
              }
  
              Entry kid = kids != null ? new Branch() : new Leaf();
              kid.setOffset(signode.getStart());
              kid.setQname(nb.getQname());
              kid.setKind(nb.getKind());
  
              if (kids != null) {
                  kid.setChildren(kids);
              }
              result.add(kid);
          }
          return result;
      } 
                              #location 10 
                              #vulnerability type NULL_DEREFERENCE