fix partial packing of multidimensional unpacked arrays

test/core/unpacked_array_depth.v

@@ -11,8 +11,11 @@ module top;
     wire [7:0] out1, out2;
     example e1(arr1[0], out1);
     example e2(arr2[0][0], out2);
-    initial begin
-        #1 arr1[0] = 8'hAD;
-        #1 arr2[0][0] = 8'h42;
+    initial begin : blk
+        integer i;
+        for (i = 0; i < 8; i = i + 1) begin
+            #1 arr1[0][i] = (8'hAD >> i) & 1'b1;
+            #1 arr2[0][0][i] = (8'h42 >> i) & 1'b1;
+        end
     end
 endmodule