diff -u 10bgwriter/src/backend/commands/trigger.c 13commitOpt/src/backend/commands/trigger.c
--- 10bgwriter/src/backend/commands/trigger.c	2004-06-03 19:26:35.000000000 -0400
+++ 13commitOpt/src/backend/commands/trigger.c	2004-06-10 16:33:27.000000000 -0400
@@ -2278,9 +2278,11 @@
 			deferredTriggers->imm_stack[deferredTriggers->numpushed];
 
 		/*
-		 * Make sure the last element is last.
+		 * Cleanup the head and the tail of the list.
 		 */
-		if (deferredTriggers->tail_thisxact != NULL)
+		if (deferredTriggers->tail_thisxact == NULL)
+			deferredTriggers->events = NULL;
+		else
 			deferredTriggers->tail_thisxact->dte_next = NULL;
 
 		/*