Cover member-select rand_mode gate for sub-object frozen array

test_regress/t/t_randomize_scoped_arg_array_randmode.v

@@ -74,6 +74,21 @@ class AssocInt extends Base;
   endfunction
 endclass
 
+class Leaf;
+  rand uint a[3];
+  constraint c {foreach (a[i]) a[i] inside {[1:10]};}
+endclass
+
+class Nested;
+  rand uint x;
+  rand Leaf leaf;
+  constraint xc {x inside {[1:100]};}
+  constraint lc {foreach (leaf.a[i]) leaf.a[i] inside {[1:10]};}
+  function new();
+    leaf = new;
+  endfunction
+endclass
+
 class NoModes;  // no rand_mode() call anywhere; scoped arg only
   rand uint x, y;
   rand uint arr[2];
@@ -212,6 +227,23 @@ module t;
       end
     end
 
+    // Frozen rand array inside a sub-object: mode gate via member select.
+    begin
+      Nested n;
+      uint snapn[3];
+      n = new;
+      ok = n.randomize();
+      `checkd(ok, 1);
+      n.leaf.a.rand_mode(0);
+      snapn = n.leaf.a;
+      for (int i = 0; i < 5; ++i) begin
+        ok = n.randomize();
+        `checkd(ok, 1);
+        if (n.leaf.a !== snapn) `checkd(0, 1);
+        if (n.x < 1 || n.x > 100) `checkd(0, 1);
+      end
+    end
+
     $write("*-* All Finished *-*\n");
     $finish;
   end