diff --git a/dot/trpl15-04.dot b/dot/trpl15-04.dot
new file mode 100644
index 0000000000..7b74016088
--- /dev/null
+++ b/dot/trpl15-04.dot
@@ -0,0 +1,35 @@
+digraph {
+    rankdir="LR";
+    dpi=300.0;
+    node [shape="plaintext"];
+
+    table0[label=<<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
+        <TR><TD SIDES="B" PORT="pte3">a</TD><TD SIDES="B" PORT="ptr0"></TD></TR>
+    </TABLE>>];
+
+    table1[label=<<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
+        <TR><TD PORT="pte0">5</TD><TD PORT="ptr1">  </TD></TR>
+    </TABLE>>];
+
+
+    table3[label=<<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
+        <TR><TD PORT="pte2">10</TD><TD PORT="ptr3">  </TD></TR>
+    </TABLE>>];
+
+
+    table2[label=<<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
+        <TR><TD SIDES="B" PORT="pte1">b</TD><TD SIDES="B" PORT="ptr2"></TD></TR>
+    </TABLE>>];
+
+
+    edge[tailclip="false"];
+    table0:ptr0:c -> table1:pte0;
+    table1:ptr1:c -> table2:pte1;
+    table2:ptr2:c -> table3:pte2;
+    table3:ptr3:c -> table0:pte3;
+
+    { rank="same"; table3; table0; }
+    { rank="same"; table1; table2; }
+
+}
+